noun Download 🔗Share Any of the ultimate leaflets of a bipinnate or tripinnate leaf; a subleaflet. Examples : "The fern's large leaf was so divided that each tiny pinnule looked like a separate, delicate leaf itself. " plant biology part nature Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share 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. Examples : "The paleontologist carefully brushed away sediment, revealing the delicate pinnules branching off the stem of the fossilized crinoid. " biology organism anatomy part plant Chat with AIVocabulary GamePractice Reading