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

1570–80; < Latin tūberculum. See tuber1, -cle1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
tubercle (ˈtjuːbəkəl)
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
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American Heritage
Medical Dictionary

tubercle tu·ber·cle (tōō'bər-kəl, tyōō'-)

  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
Already, attempts are being made to incorporate the tubercle design into commercial products.
Nothing he provided them seemed to control the tubercle bacillus flourishing in their bodies.
The non-articular portion of the tubercle is occasionally only feebly marked.
The angle is slight, and situated close to the tubercle.
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