Word.ws English Dictionary

deltoidus

deltoidus noun: the deltoid muscle.

Noun

deltoidus (plural deltoidi)

  1. the deltoid muscle.
    • The deltoid muscle of the human raises the arm. Its anterior section pulls the arm forward and rotates it inward while its posterior section pulls it backward and rotates it outward. The same muscle in the animal, known as the deltoidus, abducts the upper portion of the forelimb and flexes the...1983, Fredric Sweney, The Art of Painting and Drawing Animals, page 37
    • The deltoidus is a thick, large triangular muscle that covers the shoulder joint in the front, behind and laterally. It encircles the cap of the shoulder. The muscle fibers converge to unite in a thick tendon which inserts into the middle lateral side of the upper arm bone. The muscle's basic...2012, Arnold Schwarzenegger, Douglas Kent Hall, Arnold: The Education of a Bodybuilder

Examples of deltoidus in a sentence

  • The same muscle in the animal, known as the deltoidus, abducts the upper portion of the forelimb and flexes the shoulder.1983, Fredric Sweney, The Art of Painting and Drawing Animals, page 37:
  • The deltoidus is a thick, large triangular muscle that covers the shoulder joint in the front, behind and laterally.2012, Arnold Schwarzenegger, Douglas Kent Hall, Arnold: The Education of a Bodybuilder:
  • The muscles involved in the external rotation are: Infraspinatus, Teres minor, Deltoidus and Supraspinatus.2013, Mihaela Manisor, Cosmin Marcu, Gheorghe Tomoaia, Liviu Miclea, “Comparison between Titan and Cobalt Hydroxyapatite-Coated Shoulder...

Forms of deltoidus

pluraldeltoidi

Origin of deltoidus

Like deltoid, ultimately from Ancient Greek δέλτα (délta), the triangular fourth letter of the Greek alphabet, and the suffix -(ο)ειδής (-(o)eidḗs, “-like”), the source of English -oid. This suffix has usually been adapted in Neo-Latin as -oīdēs or -oīdeus (giving Latin deltoīdēs or deltoīdeus), but the variant or misspelling -oīdus is attested in some Latin texts. As an English word, the form deltoidus might have been taken from such Latin variants, or may have been created analogically within English by simply combining deltoid with the ending -us (seen in some other muscle names such as trapezius).

Questions about deltoidus

What does deltoidus mean?
Deltoidus means the deltoid muscle.
How do you use deltoidus in a sentence?
The same muscle in the animal, known as the deltoidus, abducts the upper portion of the forelimb and flexes the shoulder.
What part of speech is deltoidus?
Deltoidus is a noun.
What is the plural of deltoidus?
The plural of deltoidus is deltoidi.

Words near deltoidus in the dictionary

  1. deltoideus
  2. deltoideus muscle
  3. deltoideus muscles
  4. deltoidly
  5. deltoids
  6. deltoidus
  7. Deltona
  8. deltonin
  9. deltopectoral
  10. Deltoro
  11. Deltoros

Source and license

Adapted from Wiktionary: deltoidus (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “deltoidus.” Word.ws, https://word.ws/deltoidus. Based on Wiktionary, CC BY-SA 4.0.