deltoid /ˈdɛɫtɔɪd/noun 4adjective 3forms 1 noun4 •The deltoid muscle, a triangular muscle on the human shoulder. •A kite (quadrilateral having two pairs of edges of equal length, the edges of each pair touching each other at one end). •A deltoid curve (hypocycloid with three cusps). •The deltoid ligament, a triangular ligament on the human ankle. adjective3 •In the shape of the uppercase Greek letter delta (Δ); triangular. •Of or pertaining to the deltoid muscle. •Of a triangular or roughly triangular shape and attached to the stem via the side. formsdeltoids
