A letter written in clear, unjoined handwriting.

plural of block letter

(US) An identifying initial of the academic institution that is awarded to a member of a varsity team. It is made from structured cloth, and intended to be sewn to a piece of clothing such as a varsity sweater or varsity jacket.

plural of poison-pen letter

plural of French letter

plural of lethargy

plural of love letter

(genetics) A type of genetic interaction in which two (or more) mutations which are not lethal when occurring singly in a cell are lethal when they occur together in the same cell.

(US dialect) A goldfinch.

(Stephanus pagination) A standard reference letter (either a, b, c, d, or e) for a one-fifth–equal-part subdivision of a given section (denoted by the preceding Stephanus number) of a given Platonic dialogue.