momentary
adjective
[ ˈməʊm(ə)nt(ə)ri ]
• lasting for a very short time; brief.
• "a momentary lapse of concentration"
Similar:
brief,
short,
short-lived,
quick,
fleeting,
passing,
transient,
transitory,
ephemeral,
evanescent,
fugitive,
temporary,
impermanent,
fugacious,
Origin:
late Middle English: from Latin momentarius, from momentum (see moment).