frame bundle
principal bundle associated to a vector bundle, whose fiber is the (torsor over the) automorphism group of the vector-bundle fiber
en-GB/ˈfɹeɪm ˈbʌndl/
en-US/ˈfɹeɪm ˈbʌndəl/
principal bundle associated to a vector bundle, whose fiber is the (torsor over the) automorphism group of the vector-bundle fiber