What is "knot"

Node \Node\ (n[=o]d), n. [L. nodus; perh. akin to E. knot. Cf. Noose, Nowed.]

1. A knot, a knob; a protuberance; a swelling.

2. Specifically:

   1. (Astron.) One of the two points where the orbit of a planet, or comet, intersects the ecliptic, or the orbit of a satellite intersects the plane of the orbit of its primary.

   2. (Bot.) The joint of a stem, or the part where a leaf or several leaves are inserted.

   3. (Dialing) A hole in the gnomon of a dial, through which passes the ray of light which marks the hour of the day, the parallels of the sun's declination, his place in the ecliptic, etc.

   4. (Geom.) The point at which a curve crosses itself, being a double point of the curve. See Crunode, and Acnode.

   5. (Mech.) The point at which the lines of a funicular machine meet from different angular directions; -- called also knot.
      --W. R. Johnson.

   6. (Poet.) The knot, intrigue, or plot of a piece.

   7. (Med.) A hard concretion or incrustation which forms upon bones attacked with rheumatism, gout, or syphilis; sometimes also, a swelling in the neighborhood of a joint.
      --Dunglison.

   8. (Mus) One of the fixed points of a sonorous string, when it vibrates by aliquot parts, and produces the harmonic tones; nodal line or point.

   9. (Zo["o]l.) A swelling.

3. (Math., Computers) A special point in a graph or diagram which is attached to other points by links. It is often labeled and represented graphically as a box or circle. A node may represent any object which is related to other objects in a conceptual structure that can be represented as a graph, the relations being represented as links between the nodes.

4. (Anat.) A small mass of tissue differing from other tissue in its immediate vicinity; as, a lymph node.

   Ascending node (Astron.), the node at which the body is passing northerly, marked with the symbol [astascending], called the Dragon's head. Called also northern node.

   Descending node, the node at which the body is moving southwardly, marked thus [astdescending], called Dragon's tail.

   Line of nodes, a straight line joining the two nodes of an orbit.

Old English cnotta "intertwining of ropes, cords, etc.," from Proto-Germanic *knuttan- (cognates: Low German knütte, Old Frisian knotta "knot," Dutch knot, Old High German knoto, German Knoten, perhaps also Old Norse knutr "knot, knob"). Figurative sense of "difficult problem" was in Old English (compare Gordian knot). Symbolic of the bond of wedlock, early 13c. As an ornament of dress, first attested c.1400. Meaning "thickened part or protuberance on tissue of a plant" is from late 14c.\n

\nThe nautical unit of measure of speed (1630s) is from the practice of attaching knotted string to the log line. The ship's speed can be measured by the number of knots that play out while the sand glass is running.The distance between the knots on the log-line should contain 1/120 of a mile, supposing the glass to run exactly half a minute. [Jorge Juan and Antonio de Ulloa, "A Voyage to South America" 1760]\nHence the word knot came also to be used as the equivalent of a nautical mile (in pre-WWII use in U.S. and Britain, 6,080 feet). A speed of 10 knots will cover ten nautical miles in an hour (equivalent to a land speed of about 11.5 mph).

"to tie in a knot," mid-15c., from knot (n.). Related: Knotted (late 12c.), knotting.

Etymology 1 n. 1 A looping of a piece of string or of any other long, flexible material that cannot be untangled without passing one or both ends of the material through its loops. 2 (context of hair etc English) A tangled clump. 3 A maze-like pattern. 4 (context mathematics English) A non-self-intersecting closed curve in (e.g., three-dimensional) space that is an abstraction of a knot (in sense 1 above). 5 A difficult situation. 6 The whorl left in lumber by the base of a branch growing out of the tree's trunk. 7 Local swelling in a tissue area, especially skin, often due to injury. 8 A protuberant joint in a plant. 9 Any knob, lump, swelling, or protuberance. 10 The point on which the action of a story depends; the gist of a matter. 11 (context engineering English) A node. 12 A kind of epaulet; a shoulder knot. 13 A group of people or things. 14 A bond of union; a connection; a tie. vb. 1 To form into a knot; to tie with a knot or knots. 2 To form wrinkles in the forehead, as a sign of concentration, concern, surprise, etc. 3 To unite closely; to knit together. 4 (context obsolete rare English) To entangle or perplex; to puzzle. Etymology 2

n. 1 (context nautical English) A unit of speed, equal to one nautical mile per hour. 2 (context slang English) A nautical mile (qualifier: incorrectly) Etymology 3

n. One of a variety of shore birds; the red-breasted sandpiper (variously ''Calidris canutus'' or (taxlink Tringa canutus species noshow=1)).

1. v. make into knots; make knots out of; "She knotted der fingers"

2. tie or fasten into a knot; "knot the shoelaces"

3. tangle or complicate; "a ravelled story" [syn: ravel, tangle] [ant: unravel, unravel]

4. [also: knotting, knotted]

1. n. a tight cluster of people or things; "a small knot of women listened to his sermon"

2. any of various fastenings formed by looping and tying a rope (or cord) upon itself or to another rope or to another object

3. a hard cross-grained round piece of wood in a board where a branch emerged; "the saw buckled when it hit a knot"

4. something twisted and tight and swollen; "their muscles stood out in knots"; "the old man's fists were two great gnarls"; "his stomach was in knots" [syn: gnarl]

5. a unit of length used in navigation; equivalent to the distance spanned by one minute of arc in latitude; 1,852 meters [syn: nautical mile, mile, mi, naut mi, international nautical mile, air mile]

6. soft lump or unevenness in a yarn; either an imperfection or created by design [syn: slub, burl]

7. a sandpiper that breeds in the arctic and winters in the southern hemisphere [syn: grayback, Calidris canutus]

8. [also: knotting, knotted]

A knot is a fastening in rope or interwoven lines.

Knot may also refer to:

The ancient Egyptian knot hieroglyph, or girdle knot, Gardiner sign listed no. S24, portrays a reef knot. Besides its use as a hieroglyph, it has usage in statuary and reliefs. The knot hieroglyph is also an amulet, typically made of worked stone, or as jewellery elements.

KNOT (1450 AM) and FM translator K265CI (103.9) are commercial radio stations in Prescott, Arizona, simulcasting to the Flagstaff- Prescott, Arizona, area. In August 2011, the stations dropped classic country and switched to a 1960s oldies format. Bo Woods, who worked at Los Angeles oldies station KRTH, 2002-06, served as program director and morning disc jockey until November 2014.

That month, Fun Oldies began broadcasting the satellite format "Good Time Oldies" from Westwood One. The station is fully jocked with Westwood One personalities, and airs ABC News at the top of every hour, along with a mix of pre-produced and in-house imaging.

On December 10, 2015 KNOT changed their format from oldies to contemporary Christian, branded as "Arizona Shine".

In mathematics, a knot is an embedding of a circle in 3-dimensional Euclidean space, R (also known as E), considered up to continuous deformations ( isotopies). A crucial difference between the standard mathematical and conventional notions of a knot is that mathematical knots are closed—there are no ends to tie or untie on a mathematical knot. Physical properties such as friction and thickness also do not apply, although there are mathematical definitions of a knot that take such properties into account. The term knot is also applied to embeddings of S in S, especially in the case j = n − 2. The branch of mathematics that studies knots is known as knot theory, and has many simple relations to graph theory.

The knot is a unit of speed equal to one nautical mile (1.852 km) per hour, approximately 1.151 mph. The ISO Standard symbol for the knot is kn. The same symbol is preferred by the IEEE; kt is also common. The knot is a non- SI unit that is "accepted for use with the SI". Worldwide, the knot is used in meteorology, and in maritime and air navigation—for example, a vessel travelling at 1 knot along a meridian travels approximately one minute of geographic latitude in one hour.

Etymologically, the term derives from counting the number of knots in the line that unspooled from the reel of a chip log in a specific time.

Knots are unwanted, large, dark aggregates of wood fibres when making chemical pulp.

Knots are incompletely cooked wood chips coming out of the digester. Their origin is often dense parts of branches, such as compression wood or timber knots – hence the name. Knots can also stem from large/oversized wood chips due to insufficient impregnation with cooking liquors. The content of lignin is very high. In kraft pulping knots are typically 0.5–3.0 % of the digester throughput. The knots are screened from the pulp, because if left in the pulp they may damage washing equipment and consume large amounts of bleaching chemicals. They are normally sent back to the digester and re-cooked so that their fibres are not wasted.