Minke whale

Cuvier's beaked whale (Ziphius cavirostris)

plural of ligne de mire

line of sight

plural of langue de si

any of the Old Spanish dialects during the Middle Ages / any of the southern European Romance languages during the Middle Ages in which the word for yes was si, particularly Italian dialects, by opposition to langue d'oc and langue d'oïl

guiding system

eau de toilette, toilet water

plural of lettre de motivation

cover letter (letter in a job application where one expounds the reasons why one is interested in the job being advertised)