Definition of mammillary in English:


Syllabification: mam·mil·lar·y
Pronunciation: /ˈmaməˌlerē
(also mamillary)


  • 1Rounded like a breast or nipple, in particular.
    More example sentences
    • The grounds in the neighborhood are covered with those common mammillary elevations known as ‘Indian corn-hills.’
  • 1.1(Of minerals) having several smoothly rounded convex surfaces.
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    • Malachite is typically massive, forming thick, compact crusts with mammillary surfaces.
    • Pale-to-medium blue mammillary rosasite aggregates occur with malachite in oxidized rock fallen from the north face of the open pit near the decline access drift.
    • Shell units are tightly packed but separated in the mammillary layer.
  • 1.2 Anatomy Denoting two rounded bodies in the floor of the hypothalamus in the brain.
    More example sentences
    • Especially in these cases, MRI findings with high signal intensity in the thalamus and mammillary bodies can be especially important.
    • The hippocampus has output to the mamillary bodies and onto the anterior nucleus of the thalamus.
    • It was bluntly perforated in front of the mamillary bodies with the aid of a catheter.


early 17th century: from modern Latin mamillaris, from mamilla (see mamilla). The spelling variant of -mm- was due to association with mammary.

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