Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any of a group of neurocutaneous disorders of the central nervous system causing lesions on the skin and eye.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

The term, from the Greek φακός, phakos, "spot, lens" and the suffix -osis, was introduced by Jan van der Hoeve in 1920, before the distinct genetic basis of each of these diseases was understood.

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