Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

Medical Dictionary

1

deltoid

play
noun del·toid \ˈdel-ˌtȯid\

Medical Definition of deltoid

  1. :  a large triangular muscle that covers the shoulder joint, serves to raise the arm laterally, arises from the upper anterior part of the outer third of the clavicle and from the acromion and spine of the scapula, and is inserted into the outer side of the middle of the shaft of the humerus—called also deltoid muscle; see deltoid tuberosity



Illustration of deltoid


2

deltoid

adjective del·toid

Medical Definition of deltoid

  1. :  relating to, associated with, or supplying the deltoid <the deltoid branch of the thoracoacromial artery>




Learn More about deltoid


Seen and Heard

What made you want to look up deltoid? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

February 8, 2016

to clear from accusation or blame

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

spindrift kittly-benders pince-nez duvet
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ