three (part of speech: noun)
- Of the upper arm: The biceps on the front side, the triceps behind, and the deltoid at the upper part of the arm beyond the projection of the shoulder. - "Physiology and Hygiene for Secondary Schools", Francis M. Walters, A.M..
- Let him breathe a new melody, let him draw out of imagination a novel step, a more fantastic tilt of the pelvis, a wilder gesticulation of the deltoid. - "The Best Short Stories of 1921 and the Yearbook of the American Short Story", Various.