os trigonum


os tri·go·num

[TA] an independent ossicle sometimes present in the tarsus; usually it forms part of the talus, constituting the lateral tubercle of the posterior process. Synonym(s): triangular bone

os tri·go·num

(os trī-gō'nŭm) [TA] An independent ossicle sometimes present in the tarsus; usually it forms part of the talus, constituting the lateral tubercle of the posterior process.
Synonym(s): triangular bone.