Pinna, pin′a, n. a single leaflet of a pinnate leaf: a wing, fin, or the like: the auricle of the ear:—pl. Pinn′æ.—adjs. Pinn′ate, -d, shaped like a feather: furnished with wings or fins.—adv. Pinn′ately.—adjs. Pinnat′ifid, cut as a leaf, half-way down or more, with the divisions narrow or acute; Pinnat′isect (bot.), pinnately divided; Pinn′iform, like a feather or fin: pinnate; Pinn′igrade, moving by fins—also n.; Pinn′iped, Pinnat′iped, fin-footed, as a bird; Pinn′ūlate, -d.—n. Pinn′ūle, one of the branchlets of a pinnate leaf: one of the lateral divisions of the finger-like stalks of an encrinite—also Pinn′ūla.—Pinnate leaf, a compound leaf wherein a single petiole has several leaflets attached to each side of it. [L. pinna, a feather, dim. pinnula.]
Pinnace, pin′ās, n. a small vessel with oars and sails: a boat with eight oars: a man-of-war's boat. [Fr. pinasse—It. pinassa—L. pinus, a pine.]
Pinnacle, pin′a-kl, n. a slender turret: a high point like a spire: the highest point of a mountain, &c.—v.t. to build with pinnacles: to place on a pinnacle. [Fr. pinacle—Low L. pinna-culum, double dim. from L. pinna, a feather.]
Pinner, pin′ėr. See Pin.
Pinnet, pin′et, n. (Scott) a pinnacle.
Pinnock, pin′ok, n. the hedge-sparrow.
Pinnoed, pin′ōd, adj. (Spens.) pinioned.
Pinny, Pinnie, pin′ī, n. a pinafore. [Pinafore.]
Pinnywinkle, pin′i-wingk-l, n. an ancient form of torture for the fingers.—Also Pinn′iewinkle, Pil′nie-winks. [A corr. of periwinkle.]