As a noun terms
is .
As an adjective mousiest is
(mousy).
terms
English
Noun
(head)
Statistics
*
----
mousiest
English
Adjective
(head)
(mousy)
mousy
English
Alternative forms
* mousey
Adjective
(
er)
Resembling a mouse
Quiet, stealthy
Timid
A greyish brown colour.
- It's a god-awful small affair to the girl with the mousy hair (1971)