callus
cal·lus
noun
1.
3.
(botany) an isolated thickening of tissue, especially a stiff protuberance on the lip of an orchid
verb
Origin
Borrowed from Latin callum (“hard skin”). Displaced Old English wearr.
Related words
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.