Dictionary.net

• Lat. An action preferred in any court of justice. The plaintiff was called "querens," or complainant and his brief, complaint, or declaration was called "querela." Jacob.

1910 - Black's Law Dictionary (2nd edition)
By Henry Campbell Black

• kwe-r[=e]'la, n. a complaint preferred in a court.--n. QU[=E]'RENT, a plaintiff. [L.]

1908 - Chambers's Twentieth Century Dictionary of the English Language
By Thomas Davidson