ˌgrimēˈāsēˌē noun plural
Usage: capitalized
Etymology: New Latin, from Grimmia, type genus + -aceae
: a family of acrocarpous mosses that have the capsule on a short stalk and with a single peristome the teeth of which are often split or perforated and that form dark mats or cushions lacking chlorophyll except at the tips of stems and branches
• grim·mi·a·ceous |grimē|āshəs adjective