Webster's Revised Unabridged Dictionary · 1913

Inclusion

Inclusion , noun

[Latin inclusio: compare French inclusion. See Include.]

1.
The act of including, or the state of being included; limitation; restriction; as, the lines of inclusion of his policy. — Sir W. Temple
2.
Something that is included.
3.
(Mineralogy) A foreign substance, either liquid or solid, usually of minute size, inclosed in the mass of a mineral.
4.
(Biology, Cytology) A small body suspended within the cytoplasm of a cell.
5.
(Logic, Mathematics) The relationship existing between two sets if one is a subset of the other.