poliosis
Biology

poliosis


Term: poliosis
Literally meaning: ?old or gray state or whitening?
Origin: Anc Greek
??????/polios(=old, gray, venerable) >???????/palaios(=old, as in Paleontology)
+(-????/(-osis)(=suffix denoting process or state)
Coined/History
(?)
Definition
Poliosis is a localized patch of white hair caused by decrease in melanin amount in head hair, eyebrows, or eyelashes. Poliosis occurs in several hereditary syndromes (as Marfan's syndrome and tuberous sclerosis) but may be caused also by others factors as inflammation, irradiation, or infection.




- Neuroacanthocytosis
Term: neuroacanthocytosisLiterally meaning: ?neuronal condition with  thorny cell?Origin: Anc Greek ??????/nevron(=neuron) > ?????/nevra (=catgut)> (??????/nearon (=young) because catgut were made from intestines...

- Zoacanthosis
Term: zoacanthosis Literally meaning: ?spiny and thick because of an animal? Origin: Anc Greek????/zoon=(a live thing, animal)+??????/acantha(=thorn, sharp spiny structure)+(-????)/(-osis )(=suffix denoting ?process? or ?state?) Coined/History(?)...

- Thyrotoxicosis
Term: thyrotoxicosis Literally meaning: ?poisoning because of thyroid? Origin: Anc Greek??????????/thyreodes(=shield-shaped) > ??????/thyreos(=blazon, shield) > ????/thyra (=door, as this type of Greek shield resembled to an large oblong door) ???????/toxicon(=(poison...

- Sycosis
Term: sycosis Literally meaning: ?process to fig creation? Origin: Anc Greek?????/sycon(=fig)+(-????)/(-osis )(=suffix denoting ?process? or ?state?) Coined/HistoryThe name derived because usually in condition of sycosis is creating an ulcer...

- Phacomatosis
Term: phacomatosis (often called neurocutaneous syndromes) Literally meaning: ?tumor of lenses? Origin: Anc Greek?????/phacos(=lens, spot) >????/phaos(=light)+(-???)/-oma (suffix denoting ?mass growth? or a ?complete set of?) Coined/History    ...



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