Noun
A
synthetic
insecticide
,
C
<
sub
>
21
sub
>
H
<
sub
>
20
sub
>
Cl
<
sub
>
2
sub
>
O
<
sub
>
3
sub
>,
used
to
treat
head lice
,
nits
,
scabies
,
and
in
flea collars
.