Answer:

nsec

Answer	Crossword Clue
NSEC	Minute part of a minute (abbr.)
NSEC	Teensy amt. of time
NSEC	Teensy time (abbr.)

NSEC	Teeny time (abbr.)
NSEC	Teeny time unit
NSEC	Time required for light to travel about a ft.
NSEC	Tiny division of a min.
NSEC	Minuscule part of a min.
NSEC	Fraction of a min.
NSEC	Tiny time fraction: Abbr.
NSEC	Small time?: Abbr.

NSEC	Tiny time pd.
NSEC	Minuscule time pd.
NSEC	Time fraction: Abbr.
NSEC	Tiny amt. of time
NSEC	Tiny fraction of a min.
NSEC	One of 60 billion in a min.
NSEC	Minute part of a minute: Abbr.
NSEC	Roughly, time it takes for light to travel one ft.

NSEC	Tiny part of a min.
NSEC	Tiny time div.
NSEC	Infinitesimal time period: Abbr.
NSEC	It's gone in less than a flash: Abbr.
NSEC	Minute minute pt.
NSEC	Microelectronic moment (abbr.)
NSEC	One billionth of one sixtieth of a min.
NSEC	Small fraction of a min.

NSEC	Brief moment of time (abbr.)
NSEC	Tiny time unit, for short
NSEC	Small time? (abbr.)
NSEC	Tiny time fraction (abbr.)
NSEC	Extremely short time unit (abbr.)
NSEC	Tiny bit of time (abbr.)
NSEC	Extremely short time (abbr.)
NSEC	Minuscule part of a minute (abbr.)

NSEC	Tiny bit of a min.
NSEC	Short time, shortly
NSEC	Teeny amt. of time
NSEC	Minuscule time fraction: Abbr.
NSEC	Telecom unit