Meanings of thin rim in English

Sure enough, Sebrahn's pupils were dilated like a cat's in the dark, with only a thin rim of silver showing around them.

A thin man in a leather weskit, a black and straightbrim hat set square on his head, a thin rim of whiskers.

His face was turned away, only a thin rim of profile showing through his hair like the moon just before it goes dark.

Ultrastructural examination showed numerous ribosomes and several mitochondria in the thin rim of cytoplasm surrounding the nucleus, with other cytoplasmic organelles revealed in serial sections.

The same Moment, eh, Angina? And he rolled his lizard's eyes to show a thin rim of white veined like hairline cracks in ancient china.