raylike; radiate.
Historical Examples

Of the lowest among these orders, the actinoid Polyps, our Actinia or sea-anemone is a good example.
Seaside Studies in Natural History Elizabeth Cabot Cary Agassiz

having a radiate form, as a sea anemone or starfish


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  • Actinometer

    a device for measuring intensity of radiation, especially that of the sun. Historical Examples It is a good plan to employ an actinometer to judge the correct exposure. Photographic Amusements, Ninth Edition Walter E. Woodbury and Frank R. Fraprie A Johnson’s actinometer is very useful to time the exposure. Photogravure Henry R. Blaney You may […]

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