【机】 single-ended wrench
odd; single
【医】 azygos; mon-; mono-; uni-
beginning or end; cobbra; conk; crumpet; end; first; garret; hair; head
leading; nob; noddle; pate; sconce; side; top; twopenny
【医】 capita; caput; cephal-; cephalo-; head; kephal-; kephalo-
detent; lever; spanner; wrench
【化】 spanner; wrench