unreactive

adjective un·re·ac·tive \ ˌən-rē-ˈak-tiv \

Definition of unreactive

: not tending to react : not reactive
  • pupils unreactive to light
  • chemically unreactive solvents

First Known Use of unreactive

1832


Medical Dictionary

unreactive

adjective un·re·ac·tive \ -rē-ˈak-tiv \

medical Definition of unreactive

: not reactive
  • pupils unreactive to light
  • an unreactive gas

Seen and Heard

What made you want to look up unreactive? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

sticky or viscid

Get Word of the Day daily email!

Test Your Vocabulary

Find the Cousins

  • a-large-tree-with-many-branches
  • Which pair shares a common word ancestor?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Citation

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!