A small, narrow opening, fissure, crevice, or chink, as in a wall, or other substance.
A tool for forming the necks of bottles, etc.
To break into, or become full of, crannies.
To haunt or enter by crannies.
a subterranean interface at which seismic velocities change
A lack of continuity, regularity or sequence; a break or gap.
A point in the range of a function at which it is undefined or discontinuous.