Dictionary.com
Thesaurus.com

thyrotoxicosis

American  
[thahy-roh-tok-si-koh-sis] / ˌθaɪ roʊˌtɒk sɪˈkoʊ sɪs /

noun

Pathology.
  1. Graves' disease.


thyrotoxicosis British  
/ ˌθaɪrəʊˌtɒksɪˈkəʊsɪs /

noun

  1. another name for hyperthyroidism

"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

Etymology

Origin of thyrotoxicosis

First recorded in 1915–20; thyro- + toxicosis