(obsolete) Lasting only for a moment; brief. / (obsolete) important; momentous / (obsolete, engineering) Of or relating to moment or momentum.

plural of Moment

Relating to or characteristic of a moment / Synonym of momentous

As much as can be experienced in a moment.

At this time

plural of momentful

Fully and freely enjoying oneself without thought to past or future.

That has fleeting significance; having heightened relevance or importance in the short-term.

(physics) A quantum-mechanical phenomenon whereby a spinning superconductive metal sphere generates a magnetic field whose axis lines up exactly with the spin axis.

(humorous) A brief interval of forgetfulness or inattention.