noun (plural rectrices) Etymology: New Latin, from Latin, feminine of rector one that directs Date: 1768 any of the quill feathers of a bird's tail that are important in controlling flight direction
RECTRIX
Meaning of RECTRIX in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012