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Longman Dictionary of Contemporary English
circumference
noun
COLLOCATIONS FROM CORPUS
■ ADJECTIVE
head
▪ The trend in cardiovascular mortality with external conjugate was abolished by allowing for head circumference.
▪ The associations with head circumference and thinness must therefore reflect reduced fetal growth.
EXAMPLES FROM CORPUS
▪ Consider figure 6. 2; there the unit length circumference of the circle represents all potential varieties.
▪ She would only be able to move within the circumference of that tree.
▪ The center and circumference of all democracy!
▪ The ropes were five inches in circumference and made of best manila, but they had snapped like cotton.
▪ The trend in cardiovascular mortality with external conjugate was abolished by allowing for head circumference.
▪ The Vesica piscis On the diameter of a circle an equilateral triangle is described centrally such that its apex just touches the circumference.
▪ These were grouped into four sets of four placed at 90 intervals round the circumference of the module.
▪ This is about two and one-half times less than the actual circumference of about 25, 000 miles.
The Collaborative International Dictionary
Circumference

Circumference \Cir*cum"fer*ence\, v. t. To include in a circular space; to bound. [Obs.]
--Sir T. Browne.

Circumference

Circumference \Cir*cum"fer*ence\, n. [L. circumferentia.]

  1. The line that goes round or encompasses a circular figure; a periphery.
    --Millon.

  2. A circle; anything circular.

    His ponderous shield . . . Behind him cast. The broad circumference Hung on his shoulders like the moon.
    --Milton.

  3. The external surface of a sphere, or of any orbicular body.

Douglas Harper's Etymology Dictionary
circumference

late 14c., from Latin circumferentia, neuter plural of circumferens, present participle of circumferre "to lead around, take around, carry around," from circum "around" (see circum-) + ferre "to carry" (see infer). A loan-translation of Greek periphereia "periphery, the line round a circular body," literally "a carrying round" (see periphery). Related: Circumferential.

Wiktionary
circumference

n. 1 (context geometry English) The line that bounds a circle or other two-dimensional figure 2 (context geometry English) The length of such a line 3 (context obsolete English) The surface of a round or spherical object vb. (context obsolete transitive English) To include in a circular space; to bound.

WordNet
circumference
  1. n. the size of something as given by the distance around it [syn: perimeter]

  2. the length of the closed curve of a circle

Wikipedia
Circumference

The circumference (from Latin circumferentia, meaning "carrying around") of a closed curve or circular object is the linear distance around its edge. The circumference of a circle is of special importance in geometry and trigonometry. Informally "circumference" may also refer to the edge itself rather than to the length of the edge. Circumference is a special case of perimeter: the perimeter is the length around any closed figure, but conventionally "perimeter" is typically used in reference to a polygon while "circumference" typically refers to a continuously differentiable curve.

Usage examples of "circumference".

The parent form of Dionaea and Aldrovanda seems to have been closely allied to Drosera, and to have had rounded leaves, supported on distinct footstalks, and furnished with tentacles all round the circumference, with other tentacles and sessile glands on the upper surface.

Could feel in the tips of my fingers exactly what needed to be done, could see in the back of my eyes the heart, smaller than my fist, the slippery, pumping, rubbery muscle and the blood washing through the ductus arteriosus, a small vessel, no bigger than an eighth of an inch in circumference.

Jim guessed that it might take even Drumfire almost half an hour to gallop around the outer circumference.

When the cone is completed, convert it into a low frustrum of a cone by drawing stuff uniformly and in a direct line from the centre to the circumference.

Combines scythe circumference swatches, close their noose around holdout corn.

The circumference of the trunk at the nipples was 62 inches, and over the most prominent portion of the kyphosis and pigeon-breast, 74 inches.

First, you may be puzzled about why the circumference of the ride is not Lorentz contracted in exactly the same way as the ruler, and hence measured by Slim to have the same length as we originally found.

Now, it would seem, we must take account of the changing circumference with changing speed due to different degrees of Lorentz contraction.

It was such a gradual movement that he discovered it only through noticing that a black mark that had been near him five minutes ago was now at the other side of the circumference.

His head measures 19 inches in circumference, on a line with the upper ear-tips, the forehead being much narrower than the occipitoparietal portion, which is noticeably very wide.

Elsewhere on its 4,000-kilometer circumference, Ophion was as frisky as the Colorado.

The length the two men calculated for the circumference of the earth differs from modern-day satellite surveys by less than eight pages of this book.

They saw in this figure everything that should lead to reflection: the centre, the ray, and the circumference, represented to them God, Man, and the Universe.

Behind us the glowing desert rolls away to the horizon, and before us lie mile upon mile of smooth hard snow almost level, but swelling gently upwards, out of the centre of which the nipple of the mountain, that appears to be some miles in circumference, rises about four thousand feet into the sky.

To the eyes spliced into the circumference of the net we attached the canvas flotation bags and inflated them from our air bottles.