trīˈgōnēə noun
Usage: capitalized
Etymology: New Latin, from Latin trigonus triangular (from Greek trigōnos ) + New Latin -ia; from the shells suggesting the form of a triangle — more at trigon
1. : a genus of pearly-shelled bivalve mollusks (suborder Arcacea) including many extinct forms which characterize the Mesozoic rocks and a few living forms which survive on the coast of Australia
2.
[New Latin; from the often triangular shape of the fruit]
: a genus (the type of the family Trigoniaceae) of chiefly climbing tropical American shrubs