deltoid
/ˈdɛɫtɔɪd/ noun, adjective
Forms deltoids
- noun (anatomy) The deltoid muscle, a triangular muscle on the human shoulder.
- noun (anatomy) The deltoid ligament, a triangular ligament on the human ankle.
- noun (geometry) A kite (quadrilateral having two pairs of edges of equal length, the edges of each pair touching each other at one end).
- noun (geometry) A deltoid curve (hypocycloid with three cusps).
- adjective In the shape of the uppercase Greek letter delta (Δ); triangular.
- adjective (botany, of leaves) Of a triangular or roughly triangular shape and attached to the stem via the side.
- adjective Of or pertaining to the deltoid muscle.
Synonyms
Etymology
From Latin deltoideus, which was in turn from Ancient Greek adjective δελτοειδής (deltoeidḗs). See also: δέλτα (délta), the fourth letter of the Greek alphabet.
Webster’s 1913
- adjective 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.
Etymology [Gr. deltoeidh`s delta-shaped; de`lta the name of the letter ei^dos form: cf. F. deltoïde. See Delta.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “deltoid”, CC BY-SA 4.0. Details