noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   Any of the ultimate leaflets of a bipinnate or tripinnate leaf; a subleaflet.
2. 2
   division of a usually pinnately divided leaf wordnet
3. 3
   A part or an organ which resembles the barb of a feather, particularly the side branches on the stalks of crinoids; Any of the lateral divisions of the finger-like stalks of an encrinite.

Synonyms

All synonyms

pinnapinnapinnulapinnula

Etymology

From Latin pinnula.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.