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nystagmus (n.)
[nystagmus 词源字典]
medical Latin, from Greek
nystagmos
"nodding, drowsiness," from
nystazein
"to nod, be sleepy," from PIE
*sneud(h)-
"to be sleepy."
[nystagmus etymology, nystagmus origin, 英语词源]
[nystagmus 词源字典]