pinnule

One of the secondary divisions of a binnately compound leaf.

A small featherlike part or subdivision of an appendage, especially one of the small branches on the arm of a crinoid.

A small pin fixed upon a pre-telescopic astronomical instrument and serving, like the sight of a gun, to enable the observer to make an accurate pointing upon a star or other celestial object.

A pinnula.

In ichthyology, specifically, a small fin-like appendage.

In botany, a secondary pinna; one of the pinnately disposed divisions of a pinna: noting especially the ultimate divisions of the frond in ferns. Also pinnula. See cuts under indusium and Nothochlæna.

One of the small divisions of a decompound frond or leaf. See Illust. of Bipinnate leaf, under bipinnate.

Any one of a series of small, slender organs, or parts, when arranged in rows so as to have a plumelike appearance

Any of the ultimate leaflets of a bipinnate or tripinnate leaf; a subleaflet.

division of a usually pinnately divided leaf