pinnae

noun, plural pin·nae [pin-ee] /ˈpɪn i/, pin·nas.

1. Botany. one of the primary divisions of a pinnate leaf.
2. Zoology.
   1. a feather, wing, or winglike part.
   2. a fin or flipper.
3. Anatomy. auricle(def 1a).

noun plural -nae (-niː) or -nas

1. any leaflet of a pinnate compound leaf
2. zoology a feather, wing, fin, or similarly shaped part
3. another name for auricle (def. 2)

n. pl. pin•nae (pĭn′ē)

1. auricle

Plural pinnae (pĭn′ē) pinnas

1. A leaflet or primary division of a pinnately compound leaf, especially of a fern frond.