/gom foh"sis/ , n. , pl. gomphoses /-foh"seez/ . Anat.
an immovable articulation in which one bone or part is received in a cavity in another, as a tooth in its socket.
[ 1570-80; gompho-, verbid s. of gomphoûn to bolt together (deriv. of gómphos bolt, nail) + NL -sis -SIS; see -OSIS ]