Trigonia

noun Tri·go·nia \ trīˈgōnēə \

Definition of Trigonia

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

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Origin and Etymology of trigonia

New Latin, from Latin trigonus triangular (from Greek trigōnos) + New Latin -ia; from the shells suggesting the form of a triangle


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