Definify.com
Webster 1913 Edition
Etheostomoid
Eˊthe-os′to-moid
,Adj.
[NL.
etheostoma
name of a genus + -oid
.] (Zoöl.)
Pertaining to, or like, the genus
– Etheostoma
. Noun.
Any fish of the genus
Etheostoma
and related genera, allied to the perches; – also called darter
. The etheostomoids are small and often bright-colored fishes inhabiting the fresh waters of North America. About seventy species are known, including the rare snail darter
(Percina tanasi
), 3 inches long, found only in the Tennessee River and classified as a threatened species
. See Darter
.2.
Supposed matter above the air; the air itself.
Complex ether
,
Mixed ether
(Chem.)
, an ether in which the ether oxygen is attached to two radicals having different structures; as, ethyl methyl ether,
– C2H5.O.CH3
. Compound ether
(Chem.)
, an ethereal salt or a salt of some hydrocarbon as the base; an ester.
– Ether engine
(Mach.)
, a condensing engine like a steam engine, but operated by the vapor of ether instead of by steam.