(anatomy) An organ, such as the heart or colon, that is entirely within the confines of the body.

(uncountable) Banishment to a remote part of one's own country as a punishment or sanction. / (countable) A person thus banished. / (figuratively, uncountable) A sense of alienation and uprootedness.

(physics) A property, characteristic of the state of a thermodynamic system, the change of which is equal to the heat absorbed minus the work done by the system.

The process where fuel is burned within an engine such as a diesel engine, producing power directly as opposed to externally such as in a steam engine.

(US, law enforcement) A division of a law enforcement agency investigating incidents and plausible suspicions of lawbreaking and professional misconduct attributed to officers on the force.

(Internet) A hyperlink that links to another page on the same Web site.

(anatomy) The inner ear.

plural of internal ear

plural of internal organ

(literary theory) A psychological conflict that is internal to a character. / (by extension) Mental struggle arising from competing feelings, desires, impulses, etc.