deltoid.
The deltoid muscle, a triangular muscle on the human shoulder.
Meaning & usage
The deltoid muscle, a triangular muscle on the human shoulder.
The deltoid ligament, a triangular ligament on the human ankle.
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).
Where this word comes from
From Latin deltoideus, which was in turn from Ancient Greek adjective δελτοειδής (deltoeidḗs). See also: δέλτα (délta), the fourth letter of the Greek alphabet.
In the shape of the uppercase Greek letter delta (Δ); triangular.
In the shape of the uppercase Greek letter delta (Δ); triangular. Of a triangular or roughly triangular shape and attached to the stem via the side.
Of or pertaining to the deltoid muscle.
Where this word comes from
From Latin deltoideus, which was in turn from Ancient Greek adjective δελτοειδής (deltoeidḗs). See also: δέλτα (délta), the fourth letter of the Greek alphabet.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.