discolour BrE
discolor AmE

The skin of the bird had just begun to discolour.

Old mines become white, but otherwise do not discolour the leaf.

All members of this class interfere with bone development and may discolour teeth.

This has to be added so that the fruit does not immediately discolour and start to rot.

Stability: Stable under ordinary conditions, may discolour on exposure to light.

Discharges can also discolour the water leading to reduced aesthetics.

This coating will not fade or discolour over time.

The rear lights themselves often discolour and are notoriously brittle.

In any case, this form of black ink is prone to discolour quickly from black to brown.

Do not over-knead the dough while adding the fruit or it will discolour.

They can also discolour certain types of stone.

The flesh is thick, firm and white and may discolour yellow when bruised.

Prolonged exposure to direct sunlight may also discolour or dehydrate turquoise.

In August 2003, the tower was painted an ultramarine blue to cover the existing light brown which had started to discolour.

The eggs are round and milky blue on laying but quickly discolour in the increasingly dirty nest.

The exposed surfaces of products may then discolour and crack, although in bad cases, complete product disintegration can occur.

"Any time you say," he said, with ease, refusing to discolour his present delight with this miserable problem.

The white flesh of the entire fungus does not discolour when damaged, and it is soft particularly in mature specimens.

Sterling silver and pewter will oxidize and discolour from the heat.

High carbon stainless steel blades do not discolour or stain, and maintain a sharp edge for a reasonable time.

Stainless steel cutlery Can discolour and pit if left coated with food, so use the pre-wash cycle.

While she doesn't show the uncontrollable rage, she is extremely infectious and the virus causes her eyes to discolour red.

Does not decompose or discolour the paper e.g. not silver nitrate.

L. salmonicolor is associated with spruce and remains a pure orange, unlike the other two which discolour green.