black cataract (medicine) and kWh (oh)

black cataract (medicine)

black cataract

A cataract in which the lens is hardened and of a dark brown colour. In the 19th century, German black cataract meant gutta severa (q.v.).

Synonym: cataracta brunescens, cataracta nigra.

kWh (oh)

the written abbreviation of kilowatt hour or kilowatt hours

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