dye tracer
English
Noun
dye
tracer
(
plural
dye tracers
)
A
substance
, often a
fluorescent
dye
,
injected
into a
system
(like
water
or
soil
) to
track
and
study
the
movement
,
flow
, and
dispersion
of
fluids
or other
materials
within that
system
.