Lex terræ

The law of the land. The common law, or the due course of the common law ; the general law of the land. Bract, fol. 17b. Equivalent to "due process of law."

In the strictest sense, trial by oath; the privilege of making oathBracton uses the phrase to denote a freeman's privilege of being sworn in court as a juror or witness, which jurors convicted of perjury forfeited, (legem terras amittant.) Bract, fob 292b.

In modern American and English jurisprudence. A system or body of laws, written or unwritten, or so much thereof as may ba applicable to a particular case or question, considered as being local or peculiar to a given state, country, or jurisdiction, or as being different from the laws or rules relating to the same subject-matter which prevail In some other place.
Defined under Lex in Black's Law Dictionary.