Library / English Dictionary

ACTINOID

Pronunciation (US):

(GB):

 I. (noun) 

Sense 1

Meaning:

Any of a series of radioactive elements with atomic numbers 89 through 103

Synonyms:

actinide; actinoid; actinon

Classified under:

Nouns denoting substances

Hypernyms ("actinoid" is a kind of...):

group; grouping (any number of entities (members) considered as a unit)

 II. (adjective) 

Sense 1

Meaning:

Having a radial form

Example:

starfish are actinoid--that is, they are radially symmetrical

Classified under:

Adjectives

Similar:

actinomorphic; actinomorphous (capable of division into symmetrical halves by any longitudinal plane passing through the axis)

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