The sense of friable is "can be easily grinded".
Yes, any non-friable form of asbestos can become friable. Some kinds can become friable simply through aging, weathering, or normal use. Others become friable if worked with power tools, producing dust that is "friable" if allowed to accumulate without being captured and removed from the work area.
A friable callus is a collection of tissue in excess of normal that can be scraped or crumbled away.
It can be crushed into dust
A friable callus is a callus formation that has grown with the cells further apart. When a callus is not friable, it is dense and compact and when it is used to regenerate plant tissue, it grows into a lump and doesn't grow to a viable plant. A friable callus, however, allows the regenerating tissue to grow suspensions.
Friable asbestos is material that contains asbestos fibers and that can be crumbled into dust in the hand without the use of tools.
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friable
A friable colon is one that is easily upset or irritated. It can become swollen and could lead to colon disease.
"Friable" describes the condition of tissue that is easily broken or torn. That can be the result of infection or damage to the tissue from injury or disease. For example, the skin of a scleroderma patient that it is very taut and "stretched thin" can be easily damaged. That tissue would be called friable.
My dictionary says: "Easily crumbled, brittle" Friable means - easily reduced to powder. It is most often used in the context of surgery to describe tissue that is diseased/weak/thin.
Friable means to be easily crumbled into a powder. A friable surface in painting would indicate that it is chalky or peeling in such a way that the paint will not adhere to the substrate. You need to remove/clean the friable surface appropriately or you will find that the paint sticks to the decomposing surface and not to the underlying item that is expected to be painted. In a short period of time the new coating will begin to flake off.