Friable

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Related to friableness: friability

friable

[′frī·ə·bəl]
(materials)
Referring to the property of a substance capable of being easily rubbed, crumbled, or pulverized into powder.

Friable

Ability of a solid material to break down or disintegrate. A friable insulation material may lose its effectiveness; some friable materials release hazardous dust into a house.

friable

Easily crumbled or pulverized; easily reduced to powder.