reactional

re·ac·tion

R r

Definitions of reactional word

noun reactional a reverse movement or tendency; an action in a reverse direction or manner. 1
noun reactional movement in the direction of political conservatism or extreme rightism. 1
noun reactional action in response to some influence, event, etc.: the nation's reaction to the president's speech. 1
noun reactional Physiology. action in response to a stimulus, as of the system or of a nerve, muscle, etc. 1
noun reactional Medicine/Medical. the action caused by the resistance to another action. a return to the opposite physical condition, as after shock, exhaustion, or chill. 1
noun reactional Bacteriology, Immunology. the specific cellular response to foreign matter, as in testing for allergies. 1

before 1635

One of the 43% oldest English words

1635-45; re- + action, modeled on react

noun

adjective

verb

adverb

pronoun

preposition

conjunction

determiner

exclamation

A common word. It’s meaning is known to most children of preschool age. About 96% of English native speakers know the meaning and use the word.

Most Europeans know this English word. The frequency of it’s usage is somewhere between "mom" and "screwdriver".

This diagram is provided by Google Ngram Viewer