CONCHA

I. noun (plural ~e) Etymology: Italian & Latin; Italian conca semidome, apse, from Late Latin ~, from Latin, shell Date: circa 1639 1. the plain semidome of an apse, apse , something shaped like a shell, ~l adjective II. noun also concho Etymology: American Spanish ~, from Spanish, shell, from Late Latin conchula, diminutive of Latin ~ Date: 1887 an ornamental disk (as on clothing or tack) of American Indian origin featuring a shell or flower design