[toh-fuh s]
noun, plural to·phi [toh-fahy] /ˈtoʊ faɪ/. Pathology.
  1. a calcareous concretion formed in the soft tissue about a joint, in the pinna of the ear, etc., especially in gout; a gouty deposit.

Origin of tophus

1545–55; < Latin tōphus, tōfus tufa
Related formsto·pha·ceous [tuh-fey-shuh s] /təˈfeɪ ʃəs/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for tophaceous


noun plural -phi (-faɪ)
  1. pathol a deposit of sodium urate in the helix of the ear or surrounding a joint: a diagnostic of advanced or chronic goutAlso called: chalkstone
Derived Formstophaceous (təʊˈfeɪʃəs), adjective

Word Origin for tophus

C16: from Latin, variant of tōfus tufa, tuff
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

tophaceous in Medicine


  1. Of or characteristic of a tophus.
  2. Sandy; gritty.


n. pl. to•phi (-fī)
  1. A deposit of urates in the skin and tissue around a joint or in the external ear.
  2. Dental calculus; tartar.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.