psoci·dae \-ōsəˌdē, -äs-\noun plural Usage: capitalized Etymology: New Latin, from Psocus, type genus + -idae : a family of small soft-bodied winged insects (order Corrodentia) related to the book lice, widely distributed, and feeding upon lichens, fungi, and decaying vegetation • pso·cine\-ōˌsīn, äˌs-\adjective