Example Sentences

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

Definitions

noun

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

Synonyms: actinon, actinide

adjective

having a radial form

Other words

archespore, barrier, bay leaf, bind over, bristle brush, catechetical instruction, caul, electromotive force series, false flax, hereditament, itchy, melody pipe, permanent press, protective garment, sniveller, staghorn coral, subjunction, tell on, telophase, tree creeper