Imperceptible definition
Imperceptible means a facility which is designed so as to generally blend with the surrounding environment in such a way that it is easily overlooked by the average person.
Imperceptible as used above means not noticeable from day to day in progress; it does not mean imperceptible after the lapse of a period of time. The doctrine of accretion is based upon the theory that from day to day, week to week and month to month a man cannot see where his old line of boundary was; Hindson v. Ashby (1896) 2 Ch. 1 at p. 28.