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actino-

  1. a combining form with the meaning “ray, beam,” used in the formation of compound words, with the particular senses “radiation” in the physical sciences ( actinometer ) and “having raylike structures,” “radiate in form” in biology ( actinomyces; actinopod ).


actino-

combining_form

  1. indicating a radial structure

    actinomorphic

  2. indicating radioactivity or radiation

    actinometer



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Word History and Origins

Origin of actino-1

< Greek, combining form representing aktī́s (genitive aktînos ) ray, beam; -o-

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Word History and Origins

Origin of actino-1

from Greek aktino-, from aktis beam, ray

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axolotl

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actinium seriesactinobacillosis