- acapnia
[acapnia 词源字典]
- "Reduction of the level of carbon dioxide in the blood; = hypocapnia. Also: absence of carbon dioxide in the blood or in an organism's ambient atmosphere ( rare )", Late 19th cent. From Italian acapnia from ancient Greek ἄκαπνος without smoke + Italian -ia.[acapnia etymology, acapnia origin, 英语词源]