Actino- Definition
aktənō, aktinə
prefix
Radial in form.
Actinoid.
American Heritage
Actinic radiation.
Actinometer.
American Heritage
(biology) Used to form the terms relating to organisms etc. that have a radial form.
Wiktionary
(physics) Used to describe terms related to actinic radiation.
Wiktionary
affix
Of actinism or actinic rays.
Actinometer.
Webster's New World
Of radiated structure.
Actinomycete.
Webster's New World
Origin of Actino-
-
From Greek aktīs aktīn- ray nekw-t- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
From Ancient Greek ἀκτίς (aktis, “ray”).
From Wiktionary
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