Deltoid

//ˈdɛɫtɔɪd// adj, noun

adj, noun ·Moderate ·College level

Definitions

Noun
  1. 1
    The deltoid muscle, a triangular muscle on the human shoulder.
  2. 2
    a large triangular muscle covering the shoulder joint and serving to abduct and flex and extend and rotate the arm wordnet
  3. 3
    The deltoid ligament, a triangular ligament on the human ankle.
  4. 4
    A kite (quadrilateral having two pairs of edges of equal length, the edges of each pair touching each other at one end).
  5. 5
    A deltoid curve (hypocycloid with three cusps).
Adjective
  1. 1
    In the shape of the uppercase Greek letter delta (Δ); triangular. not-comparable
  2. 2
    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. not-comparable
  3. 3
    Of or pertaining to the deltoid muscle. not-comparable
Adjective
  1. 1
    triangular or suggesting a capital delta, with a point at the apex wordnet

Synonyms

All synonyms
centrifugalcuneatecuneatedcuneiformdeltdelt

Example

More examples

"The deltoid muscles need time to recover. Be careful not to over exercise them."

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.

Related phrases

anterior deltoiddeltoid curvedeltoid mothdeltoid muscleupper case

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.