(astronomy) Relating to cepheid variables. / (zoology) Of or pertaining to the family Cepheidae

(astronomy) A cepheid variable. / (zoology) Any jellyfish in the family Cepheidae

plural of cepheid

(astronomy) A radially pulsating (expanding and contracting) variable star with a regular period and known relationship between period and intrinsic brightness.

plural of cepheid variable