The Collaborative International Dictionary of English v.0.48:
Quaere \Qu[ae]"re\, v. imperative. [L., imperative of quaerere to seek.] Inquire; question; see; -- used to signify doubt or to suggest investigation. [1913 Webster]Bouvier's Law Dictionary, Revised 6th Ed (1856):
QUAERE, practice. A word frequently used to denote that an inquiry ought to be made of a doubtful thing. 2 Lill. Ab. 406.