a variable star in which changes in brightness are due to alternate contractions and expansions in volume.
(astronomy) any of a class of variable stars with regular cycles of variations in luminosity (most ranging from three to fifty days). There is a relationship between the periods of variation and the absolute magnitudes, which is used for measuring the distance of such stars
Astronomy. a northern circumpolar constellation between Cassiopeia and Draco. Also, Kepheus. Classical Mythology. an Ethiopian king, the husband of Cassiopeia and father of Andromeda. Historical Examples noun (Latin genitive) Cephei (ˈsiːfɪˌaɪ) a faint constellation in the N hemisphere near Cassiopeia and the Pole Star See also Cepheid variable noun (Greek myth) a king of Ethiopia, […]
cephradine ceph·ra·dine (sěf’rə-dēn’) n. A semisynthetic, broad-spectrum antibiotic derived from cephalosporin and used orally or administered by injection.
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