- a nut having an outer shell that becomes tough and dry and eventually splits open, as in the walnut and hickory.
Origin of tryma
1855–60; < New Latin < Greek trŷma hole, equivalent to trȳ́(ein) to rub down, wear away + -ma noun suffix marking result
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- botany a drupe produced by the walnut and similar plants, in which the endocarp is a hard shell and the epicarp is dehiscent
C19: from New Latin, from Greek truma a hole (referring to the hollow drupe), from truein to wear away