Min.; incorrectly actynolite. [f. ACTINO- ray + λίθος stone.] A bright green variety of Hornblende, occurring usually in fasciculated crystals.
1833. Lyell, Elem. Geol. (1865), 592. Hornblende and Actinolite may be united.
1835. Kirby, Habits & Inst. Anim., I. vi. 193. Actinolites, Pyrites, and other substances exhibit it [a tendency to radiation] in the former [the mineral kingdom].
1876. Page, Advd. Text-bk. Geol., v. 104. Asbestos or amianthus … may be regarded as a variety of actynolite.
