• (a.) Having a form like that of the new moon; shaped like a crescent.
Lu'nu·lar adjective [ Confer French lunulaire . See Lunula .] (Botany) Having a form like that of the new moon; shaped like a crescent. 
lunular A reference to a lune or lunule; in the form of a lunule, crescent-shaped.
crescent-shaped: lunular markings.