tu·ber·cle

[too-ber-kuhl, tyoo-]
noun
1.
a small rounded projection or excrescence, as on a bone or on the surface of the body.
2.
Pathology.
a.
a small, firm, rounded nodule or swelling.
b.
such a swelling as the characteristic lesion of tuberculosis.
3.
Botany. a tuberlike swelling or nodule.

Origin:
1570–80; < Latin tūberculum. See tuber1, -cle1

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
tubercle (ˈtjuːbəkəl) [Click for IPA pronunciation guide]
 
n
1.  any small rounded nodule or elevation, esp on the skin, on a bone, or on a plant
2.  any small rounded pathological lesion of the tissues, esp one characteristic of tuberculosis
 
[C16: from Latin tūberculum a little swelling, diminutive of tuber]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Tubercle is always a great word to know.
So is foramen. Does it mean:
a small central region of the retina, location of most cones
A rounded opening through which blood vessels, nerves, or ligaments pass Hole
American Heritage
Medical Dictionary

tubercle tu·ber·cle (t&oomacr;'bər-kəl, ty&oomacr;'-)
n.

  1. An anatomical nodule. Also called tuberculum.

  2. A small elevation on the surface of a tooth.

  3. A nodule or swelling, especially a mass of lymphocytes and epithelioid cells forming the characteristic granulomatous lesion of tuberculosis.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
tubercle   (t'bər-kəl)  Pronunciation Key 
A small rounded projection, swelling, or lump, as on the roots of legumes or on bodily tissue, especially the cluster of inflammatory cells that form in the lungs in tuberculosis.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The angle is slight, and situated close to the tubercle.
The non-articular portion of the tubercle is occasionally only feebly marked.
At the lateral extremity of the condyle is a small tubercle for the attachment of the temporomandibular ligament.
Already, attempts are being made to incorporate the tubercle design into commercial products.
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