Deltoid
Pronunciation : Del"toid
Part of Speech : a.
Etymology : [Gr. deltoeidh`s delta-shaped; de`lta the name of the letter ei^dos form: cf. F. delto?de. See Delta.]
Definition : Defn: Shaped like the Greek Deltoid leaf (Bot.), a leaf in the form of a triangle with the stem inserted at the middle of the base. -- Deltoid muscle (Anat.), a triangular muscle in the shoulder which serves to move the arm directly upward.
Source : Webster's Unabridged Dictionary, 1913