Standard Lemma guide

deltoid

adj · noun · 9 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • UK: /ˈdɛɫtɔɪd/
  • US: Recorded audio is listed in the source snapshot.

1

adj

Meaning 1

In the shape of the uppercase Greek letter delta (Δ); triangular.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adj

Meaning 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.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Topics: biology, botany, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

adj

Meaning 3

Of or pertaining to the deltoid muscle.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

The deltoid muscle, a triangular muscle on the human shoulder.

Definition source: English Wiktionary via Wiktextract

Topics: anatomy, medicine, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: delt

Antonyms: none provided

5

noun

Meaning 5

The deltoid ligament, a triangular ligament on the human ankle.

Definition source: English Wiktionary via Wiktextract

Topics: anatomy, medicine, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

noun

Meaning 6

A kite (quadrilateral having two pairs of edges of equal length, the edges of each pair touching each other at one end).

Definition source: English Wiktionary via Wiktextract

Topics: geometry, mathematics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

7

noun

Meaning 7

A deltoid curve (hypocycloid with three cusps).

Definition source: English Wiktionary via Wiktextract

Topics: geometry, mathematics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

8

adjective satellite

Meaning 8

triangular or suggesting a capital delta, with a point at the apex

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

9

noun

Meaning 9

a large triangular muscle covering the shoulder joint and serving to abduct and flex and extend and rotate the arm

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: deltoid muscle, musculus deltoideus

Antonyms: none provided

Broader terms: skeletal muscle, striated muscle

History

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.

Across languages

Translations

23 source translations are retained for this English entry.

  • Catalan: deltoïdal — of or connected with deltoid muscle
  • Finnish: hartialihas- — of or connected with deltoid muscle
  • Finnish: hartialihaksen — of or connected with deltoid muscle
  • French: deltoïde — of or connected with deltoid muscle
  • Russian: дельтовидный (delʹtovidnyj) — of or connected with deltoid muscle
  • Spanish: deltoides — of or connected with deltoid muscle
  • Spanish: deltoideo — of or connected with deltoid muscle
  • Finnish: kolmiomainen — botany: of triangular shape
  • Irish: triantánach — botany: of triangular shape
  • Catalan: deltoide — triangular muscle on the human shoulder
  • Chinese Mandarin: 三角肌 (sānjiǎojī) — triangular muscle on the human shoulder
  • Finnish: hartialihas — triangular muscle on the human shoulder
  • French: deltoïde — triangular muscle on the human shoulder
  • Hungarian: deltaizom — triangular muscle on the human shoulder
  • Ido: deltoido — triangular muscle on the human shoulder
  • Japanese: 三角筋 (sankakukin) — triangular muscle on the human shoulder
  • Korean: 삼각근 (samgakgeun) — triangular muscle on the human shoulder
  • Latin: musculus deltoides — triangular muscle on the human shoulder
  • Māori: ua pokohiwi — triangular muscle on the human shoulder
  • Spanish: (músculo) deltoides — triangular muscle on the human shoulder
  • Spanish: muñón — triangular muscle on the human shoulder
  • Finnish: deltaligamentti — triangular ligament on the human ankle
  • Japanese: 三角靱帯 (sankakujintai) — triangular ligament on the human ankle