Id est (i. e.).—That is, that is to say.

Ignis fatuus (ig´niss fat´u-us).—A deceiving fire: a Will-o’-the-wisp; an inflammable gas frequently seen over marshes, which leads the traveler who pursues it into the bog.

Ignorantia legis excusat neminem (ignoran´shia lē´jis excū´sat nem´inem).—Ignorance of the law excuses nobody.

Imo pectore (ī´mo pek´tor-e).—From the bottom of the heart.

Impedimenta (im-pedi-men´ta).—The baggage of an army; luggage in traveling.

Imperium in imperio (imper´ium in imper´io).—One government within another.

Imprimatur (imprimā´tur).—Let it be printed. The term is used to signify the permission to print a book.

Imprimis (im-prī´miss).—In the first place, chiefly, especially.

In æternum (in ēter´num).—Forever.

In articulo mortis (ar-tik´ulo mor´tis).—At the point of death.