Meaning

noun any of several small round bones formed in a tendon where it passes over a joint

originEtymology tree English sesame Ancient Greek -ο- (-o-)der. Latin -o- Proto-Indo-European *weyd- Proto-Indo-European *-os Proto-Indo-European *wéydos Proto-Hellenic *wéidos Ancient Greek εἶδος (eîdos) Proto-Indo-European *-os Proto-Indo-European *-ēs Ancient Greek -ης (-ēs) Ancient Greek -ειδής (-eidḗs) Latin -oīdēslbor. English -oid English sesamoid From sesame + -oid.

Etymology from Wiktionary, CC BY-SA 3.0