A foraminiferan of the order Miliolida or the suborder Miliolina, especially one of the family Miliolidae.
Of or relating to miliolids; (of limestone) = milioline .
Late 19th century; earliest use found in Philosophical Transactions of the Royal Society of London. From scientific Latin Miliolidae, family name from Miliola + -idae. Miliolidae was used as a suborder name in Y. Delage & E. Hérouard Traité de Zool. Concrète I. 117.