Crossword clues for pinnae
pinnae
The Collaborative International Dictionary
Pinna \Pin"na\, n.; pl. Pinn[ae], E. Pinnas. [L., a feather.]
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(Bot.)
A leaflet of a pinnate leaf. See Illust. of Bipinnate leaf, under Bipinnate.
One of the primary divisions of a decompound leaf.
(Zo["o]l.) One of the divisions of a pinnate part or organ.
[L. pinna, akin to Gr. ?.] (Zo["o]l.) Any species of Pinna, a genus of large bivalve mollusks found in all warm seas. The byssus consists of a large number of long, silky fibers, which have been used in manufacturing woven fabrics, as a curiosity.
(Anat.) The auricle of the ear. See Ear.
Wiktionary
n. (en-irregular plural of: pinna)
WordNet
See pinna
Usage examples of "pinnae".
The pinnae move forwards and at the same time sink downwards, whilst the main petiole rises considerably.
The petiole of a leaf was fixed to a cork support, close to the point whence the four pinnae diverge, with a short fine filament cemented longitudinally to one of the two terminal pinnae, and a graduated semicircle was placed close beneath it.
The leaflets move towards the apex of the pinna and become imbricated, and the pinnae then look like bits of dangling string.
The pinnae themselves move downwards, and at the same time backwards or towards the stem of the plant.
The four pinnae also approach each other closely, and the whole leaf is thus rendered very compact.
It consists of a long petiole bearing only two pinnae (here represented as rather more divergent than is usual), each with two pairs of leaflets.
The pinnae also approach each other closely, so that the four terminal leaflets come together.
The hinder pairs of pinnae likewise sink downwards, but do not converge, that is, move towards the apex of the leaf.
But the pinnae at the same time sink greatly, and sometimes hang almost perpendicularly downwards.
The pinnae approach one another, but remain in the same plane as during the day.
Now in these three latter cases, though the pinnae do not mutually protect one another at night, yet after having sunk down they expose, as does a dependent sleeping leaf, much less surface to the zenith and to radiation than if they had remained horizontal.
With this latter plant, moreover, the pinnae converge in the evening by a steady movement, whereas during the day they are continually converging and diverging to a slight extent.
In some species the petioles rise up greatly at night, and the pinnae close together.
Moving to a position directly under one of these pinnae (the proper technical name), her escort informed her: "Here you have what is, unfortunately, a typical example of the Solarian fighter.
All around him, the jungle sighed and swayed, and humming clouds of gnats made rainbows over the dew-laden pinnae of the fern.