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actinograph

American

[ak-tin-uh-graf, -grahf] / ækˈtɪn əˌgræf, -ˌgrɑf /

noun

a recording actinometer.

Other Word Forms

Etymology

Origin of actinograph

First recorded in 1830–40; actino- + -graph

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.