Definitions
from The Century Dictionary.
- Having the form of rays; resembling a starfish; conspicuously radiate: as, the actinoid type of echinoderms.
from the GNU version of the Collaborative International Dictionary of English.
- adjective Having the form of rays; radiated, as an actinia.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun inorganic chemistry
actinide - adjective Having the form of
rays ; radiated, as in the species of the family Actiniidae.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun any of a series of radioactive elements with atomic numbers 89 through 103
- adjective having a radial form
Etymologies
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Examples
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Far more entertaining would be a tie-in with Los Alamos, and the Metallurgist Chef explaining the culinary wonders of the actinoid series, and why the Oppenheimer Diet is going to be the next big thing in weight loss.
Althouse on the road. Ann Althouse 2009
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Linnaeus necessitated the breaking up of that class into several very distinct classes, so more careful investigation requires the breaking up of Cuvier's "Radiata" (which succeeded the "Vermes" as a sort of zoological lumber-room) into several very distinct and well-defined new classes, of which the Acalephae, Hydrostatic Acalephae, actinoid and hydroid polypes, will form one.
Life and Letters of Thomas Henry Huxley — Volume 1 Thomas Henry Huxley 1860
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There are fifteen actinoid (rare earth) elements from which fissile isotopes can be produced; uranium and thorium are the only naturally occurring actinoids.
Dissident Voice 2009
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It is not to be supposed that one could occupy one's self with the animals for so long without coming to some conclusion as to their systematic place, however subsidiary to observation such considerations must always be regarded, and it seems to me (although on such matters I can of course only speak with the greatest hesitation) that just as the more minute and careful observations made upon the old "Vermes" of Linnaeus necessitated the breaking up of that class into several very distinct classes, so more careful investigation requires the breaking up of Cuvier's "Radiata" (which succeeded the "Vermes" as a sort of zoological lumber-room) into several very distinct and well-defined new classes, of which the Acalephae, Hydrostatic Acalephae, actinoid and hydroid polypes, will form one.
The Life and Letters of Thomas Henry Huxley Huxley, Leonard 1900
hernesheir commented on the word actinoid
1906 US Railway Assn. Standard Cipher Code used in telegraphic communications to mean "The action you have taken is not approved".
January 19, 2013