exostosisn.
/ɛksɒˈstəʊsɪs/ 1. Pathology.
a. The formation of bone on another bone, or on some other structure in the body.
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exostosis1804
osthexy1822
hyperostosis1835
parostosis1868
rider's bone1870
1804 J. Abernethy Surg. Observ. 32 Tumours growing near, and compressing the surface of bones, frequently occasion a degree of exostosis.
b. concrete. A bony tumour found upon a bone or cartilage.
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the world > health and disease > ill health > a disease > growth or excrescence > [noun] > tumour > bony tumour
exostosis1736
osteoid1845
osteoma1846
osteochondrophyte1848
1736 J. Freke Let. 15 Apr. in Philos. Trans. 1739–40 (Royal Soc.) (1742) 41 369 It may be said to come under the Denomination of an Exostosis.
1782 W. Heberden Comm. Hist. & Cure Dis. xi Except some exostoses of the vertebræ of the thorax.
1836–9 Todd's Cycl. Anat. & Physiol. II. 220/2 Exostosis appears most frequently on the upper jaw.
1868 C. Darwin Variation Animals & Plants II. xii. 23 Bony exostoses on the legs [of a horse] caused by too much travelling on hard roads.
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2. Botany. ‘A diseased condition in plants, in which hard masses of wood are produced, projecting like warts or tumours from the main stem or roots’ ( Treasury Bot. 1866).
This entry has not yet been fully updated (first published 1894; most recently modified version published online June 2022).
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n.1736