actinolite

[ ak-tin-l-ahyt, ak-tuh-nl- ]

noun

, Mineralogy.

1. a variety of amphibole, occurring in greenish bladed crystals or in masses.

actinolite

/ ækˈtɪnəˌlaɪt /

noun

1. a green mineral of the amphibole group consisting of calcium magnesium iron silicate. Formula: Ca 2 (Mg,Fe) 5 Si 8 O 22 (OH) 2

actinolite

/ ăk-tĭn′ə-līt′ /

1. A greenish variety of amphibole. Actinolite is a monoclinic mineral, and occurs in long, slender, green needlelike crystals, or in fibrous, radiated forms in metamorphic rocks. Chemical formula: Ca 2 (Mg,Fe) 5 Si 8 O 22 OH 2 .

Other Words From

• ac·tin·o·lit·ic [ak-tin-l-, it, -ik, ak-t, uh, -nl-], adjective

Word History and Origins

Origin of actinolite¹

First recorded in 1825–35; actino- + -lite

Word History and Origins

Origin of actinolite¹

C19: from actino- (from the radiating crystals in some forms) + -lite

Example Sentences

Actinolite is a green silicate of lime, magnesia, and iron 322 especially common in certain metamorphic rocks.

From Project Gutenberg

It is entirely composed of a slaty rock, traversed by numerous veins of Actinolite.

From Project Gutenberg

The actinolite slate is dark green, and formed by an almost insensible gradation from the mica slate.

From Project Gutenberg

Byssolite, bis′o-līt, n. an olive-green variety of actinolite, in long crystals.

From Project Gutenberg