inclusion

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The act of including or the state of being included.
• noun Something included.
• noun A solid, liquid, or gaseous foreign body enclosed in a mineral or rock.
• noun A nonliving mass, such as a droplet of fat, in the cytoplasm of a cell.
• noun Computers A logical operation that assumes the second statement of a pair is true if the first one is true.

from The Century Dictionary.

• noun The contents of vesicles, of all sizes, in protoplasm as an emulsion, enveloped by pellicles of the continuous substance or plasma; the discontinuous portions of protoplasm.
• noun The act of including, or the state of being included.
• noun That which is included or inclosed.

from the GNU version of the Collaborative International Dictionary of English.

• noun The act of including, or the state of being included; limitation; restriction.
• noun Something that is included.
• noun (Min.) A foreign substance, either liquid or solid, usually of minute size, inclosed in the mass of a mineral.
• noun (Biol., Cytology) A small body suspended within the cytoplasm of a cell.
• noun (Logic, Math.) The relationship existing between two sets if one is a subset of the other.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun countable An addition or annex to a group, set, or total.
• noun uncountable The act of including, i.e. adding or annexing, (something) to a group, set, or total.
• noun countable Anything foreign that is included in a material,
• noun countable, mineralogy Any material that is trapped inside a mineral during its formation, as a defect in a precious stone.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the state of being included
• noun the act of including
• noun the relation of comprising something
• noun any small intracellular body found within another (characteristic of certain diseases)