tectrix

noun, plural tec·tri·ces [tek-truh-seez, tek-trahy-seez] /ˈtɛk trəˌsiz, tɛkˈtraɪ siz/. Ornithology.

1. covert(def 8).

noun plural tectrices (ˈtɛktrɪˌsiːz, tɛkˈtraɪsiːz)

1. (usually plural) ornithol another name for covert (def. 6)