瞬

to wink

eye / (literary) to look; to regard / eye (of a net); mesh / mesh size; grit size (abbr. for 目數|目数[mu4 shu4]) / item; section / list; catalogue / (taxonomy) order / name; title

Shun (c. 23rd century BC), mythical sage and leader

split second

one instant / very short time / the twinkle of an eye

in an instant a myriad changes (idiom); rapid substantial change

instantaneous

in a flash / twinkling / ephemeral

prompt radiation

gazing fixedly (idiom)

(physics) (attributive) transient

in the wink of an eye / in a flash

prompt radiation

prompt neutron