Hypertext Webster Gateway: "Dipneumona"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Dipneumona \Dip*neu"mo*na\, n. pl. [NL., fr. Gr. ? = ? lung.]
(Zo["o]l.)
A group of spiders having only two lunglike organs. [Written
also {Dipneumones}.]
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