underactive

[ uhn-der-ak-tiv ]
/ ˌʌn dərˈæk tɪv /

adjective

insufficiently active: an underactive thyroid gland.

Nearby words

  1. under-the-counter,
  2. under-the-table,
  3. underachieve,
  4. underachiever,
  5. underact,
  6. underage,
  7. underarm,
  8. underarmed,
  9. underbearer,
  10. underbelly

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. 2019


British Dictionary definitions for under-activity

underactive

/ (ˌʌndərˈæktɪv) /

adjective

(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