Main Entry: am·phi·as·ter Pronunciation: 'am-fE-"as-t&r Function: noun : the achromatic figure of mitotic cell division especiallyin animal cells in which two asters are connected by a spindle —am·phi·as·tral/"am-fE-'as-tr&l/adjective
amphiaster am·phi·as·ter (ām'fē-ās'tər) n. A double-star figure present in the cell during mitosis, consisting of two astrospheres connected by a spindle, formed just before the division of the nucleus. Also called diaster.