Toxic levels can lead to neurological problems, brittle hair and deformed nails.
From the sltrib.com
The rock was so brittle in places that drilling mud cracked it open and escaped.
From the online.wsj.com
Its texture is often course and brittle compared with hair with natural pigment.
From the lohud.com
Brittle with age and leaking, they no longer can be opened to draw in fresh air.
From the dispatchpolitics.com
And old metallic gas pipes are being replaced by less brittle polyethylene ones.
From the guardian.co.uk
But when stacked to form thicker materials, it turns brittle, limiting its uses.
From the newscientist.com
However, the interior plastics seemed cheap and the switches had a brittle feel.
From the wheels.blogs.nytimes.com
Bricks made with the poorly mixed cement are brittle and break off at the touch.
From the chron.com
To begin, it's often funny in the bright, brittle fashion of the better sitcoms.
From the time.com
More examples
Caramelized sugar cooled in thin sheets
Having little elasticity; hence easily cracked or fractured or snapped; "brittle bones"; "glass is brittle"; "`brickle' and `brickly' are dialectal"
Lacking warmth and generosity of spirit; "a brittle and calculating woman"
(of metal or glass) not annealed and consequently easily cracked or fractured
(brittleness) firm but easily broken
A material is brittle if it is liable to fracture when subjected to stress. That is, it has little tendency to deform (or strain) before fracture. This fracture absorbs relatively little energy, even in materials of high strength, and usually makes a snapping sound.
Brittles are confections, usually very hard and brittle, which consist of flat broken pieces of hard sugar candy embedded with nuts such as pecans and almonds, as well as legumes such as peanuts.
The term software brittleness refers to the increased difficulty in fixing older software that may appear reliable, but fails badly when presented with unusual data or altered in a seemingly minor way. The term is derived from analogies to metalworking.
A confection of caramelized sugar and nuts; Inflexible, may break or snap easily under stress or pressure; Not physically tough or tenacious; apt to break or crumble when bending; Said of rocks and minerals with a conchoidal fracture; capable of being knapped or flaked; Emotionally fragile, ...