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Webster 1913 Edition
Neo-
Ne′o-
.[Gr.
νέοσ
youthful, new. See New
.] A prefix meaning
new
, recent
, late
; and in chemistry designating specifically that variety of metameric hydrocarbons which, when the name was applied, had been recently classified, and in which at least one carbon atom is connected directly with four other carbon atoms; – contrasted with normal and iso-; as,
neo
pentane; the neo
paraffins. Also used adjectively.