My two worlds rarely come together because they are sharply demarcated by prejudice on both sides.

The fur of the underparts appears dark gray, and is not sharply demarcated from the upperparts.

The underparts are white or very pale grey, with the fur being sharply demarcated from that on the rest of the body.

The head, chin, throat and upperparts are black and sharply demarcated against the white underparts.

Ten miles down was the wandering line of the forest border, sharply demarcated from the veldt.

A xanthelasma is a sharply demarcated yellowish collection of cholesterol underneath the skin, usually on or around the eyelids.

The complete black face mask is sharply demarcated from the white throat.

But in our world wilderness is sharply demarcated, surrounded and, in logistical terms, not really wilderness at all, like Yellowstone.

The erythematous skin lesion enlarges rapidly and has a sharply demarcated raised edge.

Its underwing is white with a black tip, with a broad sharply demarcated dark band at the leading edge.