What is the meaning of Interstice?

A small opening or space between objects, especially adjacent objects or objects set closely together, such as between cords in a rope, components of a multiconductor electrical cable or atoms in a crystal.

A fragment of space.

An interval of time required by the Roman Catholic Church between the attainment of different degrees of an order.

A small interval of time free to be spent on activities other than one's primary goal.

interstice

gap, interval

Source: wiktionary.org