n. A dark brown amphibole mineral; a mixed silicate of iron and magnesium.
the GNU version of the Collaborative International Dictionary of English
n. A mineral of the hornblende group, of a yellowish gray or clove brown color.
The Century Dictionary and Cyclopedia
n. A mineral, allied to amphibole or hornblende, occurring in radiating columnar aggregates. It is orthorhombic in crystallization.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a dark brown mineral of the amphibole group; magnesium iron silicate
Word Usage
"The first recorded application can be traced to Finland (approximately 2500 B.C.), where anthophyllite from a local deposit was used to reinforce clay utensils and pottery."