underactive

[uhn-der-ak-tiv]

Origin of underactive

First recorded in 1955–60; under- + active
Related formsun·der·ac·tiv·i·ty, un·der·ac·tive·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for underactive

Historical Examples of underactive


British Dictionary definitions for underactive

underactive

adjective
  1. (of the thyroid or adrenal glands) not functioning at full capacity
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