actinolite

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

/ ækˈtɪn lˌaɪt, ˈæk tə nl- /

Save This Word!

noun Mineralogy.

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

QUIZ

WILL YOU SAIL OR STUMBLE ON THESE GRAMMAR QUESTIONS?

Smoothly step over to these common grammar mistakes that trip many people up. Good luck!

Question 1 of 7

Fill in the blank: I can’t figure out _____ gave me this gift.

who

whom

TAKE THE QUIZ TO FIND OUT

Origin of actinolite

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

OTHER WORDS FROM actinolite

ac·tin·o·lit·ic

[ak-tin-l-it-ik, ak-tuh-nl-], /ækˌtɪn lˈɪt ɪk, ˌæk tə nl-/, adjective

Words nearby actinolite

actinodermatitis, actinodrome, actinogram, actinograph, actinoid, actinolite, actinology, actinomere, actinometer, actinomorphic, actinomyces

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use actinolite in a sentence

Actinolite is a green silicate of lime, magnesia, and iron 322 especially common in certain metamorphic rocks.
Geology|William J. Miller
It is entirely composed of a slaty rock, traversed by numerous veins of Actinolite.
A Guide to the Mount's Bay and the Land's End|John Ayrton Paris
The actinolite slate is dark green, and formed by an almost insensible gradation from the mica slate.
In the Arctic Seas|Francis Leopold McClintock
Byssolite, bis′o-līt, n. an olive-green variety of actinolite, in long crystals.
Chambers's Twentieth Century Dictionary (part 1 of 4: A-D)|Various

British Dictionary definitions for actinolite

actinolite

/ (ækˈtɪnəˌlaɪt) /

noun

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

Word Origin for actinolite

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

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for actinolite

actinolite

[ ăk-tĭn′ə-līt′ ]

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: Ca2(Mg,Fe)5Si8O22OH2.