The Collaborative International Dictionary
Momental
Momental \Mo*men"tal\, a. [Cf. OF. momental.] [Obs.]
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Lasting but a moment; brief.
Not one momental minute doth she swerve.
--Breton. Important; momentous.
(Mech.) Of or pertaining to moment or momentum.
Wiktionary
momental
a. 1 (context obsolete English) Lasting only for a moment; brief. 2 (context obsolete English) important; momentous 3 (context obsolete engineering English) Of or relating to moment or momentum.