PetVideo by Name

So slight as to be difficult to detect or describe; elusive, Operating in a hidden, usually injurious way; insidious, Characterized by refinement and niceness in drawing distinctions; nicely discriminating; -- said of persons; ; refined; tenuous; sinuous; insinuating; hence, penetrative or pervasive; -- said of the mind; its faculties, or its operations; ; also, difficult of apprehension; elusive

disturb in mind or make uneasy or cause to be worried or alarmed

United States physicist (born in Germany) who collaborated with Morley in the Michelson-Morley experiment (1852-1931)

a Hebrew minor prophet