(chiefly Britain) A letter written to a newspaper editor, politician, etc., expressing eccentric views; such a letter is often stereotyped as being handwritten in green ink, characterized by the frequent use of capital letters and underlining, and lengthy.

A letter written in superscript, usually when it indicates an abbreviation.

plural of lettre de cachet

(US) An official document confirming that an applicant for a mortgage has been qualified to borrow a certain amount of money at, or below, a specific interest rate.

plural of sea letter

The customary certificate of national character which neutral merchant vessels are bound to carry in time of war; a passport for a vessel and cargo.

(medicine, dated) Langerhans cell histiocytosis

A fatal autosomal genetic disorder of horses, resulting in a white coat, blue eyes, and a non-functioning colon.

plural of red letter law

plural of letter box