archaeoastronomy; the study of the astronomy of ancient cultures; also written astro-archaeology
(not in technical use) exobiology. noun the branch of biology that investigates the possibility of life elsewhere in the universe n. 1903, from French astrobiologie; see astro- + biology. Related: Astrobiological; astrobiologist. astrobiology (ās’trō-bī-ŏl’ə-jē) See exobiology.
astroblast astroblast as·tro·blast (ās’trə-blāst’) n. A primitive cell that develops into an astrocyte.
an erosional scar on the earth’s surface, produced by the impact of a cosmic body, as a meteorite or asteroid. Compare (def 2). noun a mark on the earth’s surface, usually circular, formed by a large ancient meteorite impact n. 1961, from astro- + Greek bleme “throw of a missile; wound caused by a missile,” […]
astroblastoma astroblastoma as·tro·blas·to·ma (ās’trō-blā-stō’mə) n. A poorly differentiated tumor composed of astrocytes and arranged radially with short fibrils terminating on small blood vessels. Also called grade II astrocytoma, grade III astrocytoma.
noun the branch of botany that investigates the possibility that plants grow on other planets