lobule

noun

lob·​ule ˈlä-(ˌ)byül How to pronounce lobule (audio)
: a small lobe
also : a subdivision of a lobe

Examples of lobule 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.
Invasive lobular carcinoma starts in the breast glands (or lobules) that produce milk, and can spread to other parts of the body. Emily Kay Votruba, EverydayHealth.com, 21 Oct. 2025 This is a cancer that starts in the milk-producing lobules in the breast. Wendy Grossman Kantor, PEOPLE, 15 Oct. 2025 This matters because most breast cancers begin in glandular and fibrous tissues, specifically the milk ducts or lobules. Jennie Durant, Glamour, 1 Oct. 2025 The tumor is only present within the breast lobules (glands that can make milk) and ducts (tubes that can carry breast milk to the nipple). Joy Emeh, Health, 25 Mar. 2025

Word History

First Known Use

1682, in the meaning defined above

Time Traveler
The first known use of lobule was in 1682

Browse Nearby Words

Cite this Entry

“Lobule.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lobule. Accessed 5 Jul. 2026.

Medical Definition

lobule

noun
lob·​ule ˈläb-(ˌ)yü(ə)l How to pronounce lobule (audio)
1
: a small lobe
the lobule of the ear
2
: a subdivision of a lobe
specifically : one of the small masses of tissue of which various organs (as the liver) are made up

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