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actino-
- 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
- indicating a radial structure
actinomorphic
- indicating radioactivity or radiation
actinometer
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Word History and Origins
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Word History and Origins
Origin of actino-1
from Greek aktino-, from aktis beam, ray
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