labrum

noun

la·​brum ˈlā-brəm How to pronounce labrum (audio)
1
: an upper or anterior mouthpart of an arthropod consisting of a single median piece in front of or above the mandibles
2
: a ring of fibrous cartilage forming the margin of the shallow cavity of the upper part of the scapula by which the humerus articulates with the shoulder girdle

Examples of labrum in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The Reds called him up that May and his promising rookie year ended in September after he was diagnosed with a torn labrum. C. Trent Rosecrans, New York Times, 10 July 2025 Folks with acute back pain, disc issues (include herniations, bulgings, and protrusions), and hip labrum injuries, should check with a medical pro first before doing this move, Dr. Yu says. Jenny McCoy, SELF, 19 June 2025 Then, after seemingly recovering from the injury, Ohtani tore his labrum in his left shoulder on an awkward slide during last year’s World Series. Sean Neumann, People.com, 17 June 2025 When the shoulder pops out, known as a dislocation or subluxation, the labrum is usually torn off the bone. Harlan Selesnick, Miami Herald, 29 May 2025 See All Example Sentences for labrum

Word History

Etymology

New Latin, from Latin, lip, edge — more at lip

First Known Use

1578, in the meaning defined at sense 2

Time Traveler
The first known use of labrum was in 1578

Browse Nearby Words

Cite this Entry

“Labrum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/labrum. Accessed 25 Jul. 2025.

Kids Definition

labrum

noun
la·​brum ˈlā-brəm How to pronounce labrum (audio)
: the upper mouthpart of an arthropod in front of or above the mandibles

Medical Definition

labrum

noun
la·​brum ˈlā-brəm How to pronounce labrum (audio)
plural labra -brə How to pronounce labrum (audio)
1
: an upper or anterior mouthpart of an arthropod consisting of a single median piece in front of or above the mandibles
2
: a fibrous ring of cartilage attached to the rim of a joint: as
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