Sesamoid

Part of speech: noun (n.)

A sesamoid bone or cartilage.

Part of speech: adjective (a.)

1. Resembling in shape the seeds of sesame.

2. Of or pertaining to the sesamoid bones or cartilages; sesamoidal. Sesamoid bones, Sesamoid cartilages (Anat.), small bones or cartilages formed in tendons, like the patella and pisiform in man.