单词 orthaxial 释义 orthaxial, a. Ichthyol.|ksl|[f. ortho-, orth-, straight + axial.]Having the vertebral axis straight, as the tail of a diphycercal fish.1886J. A. Ryder in Rep. U.S. Comm. Fisheries 1884 985 The word orthaxial is used to designate the a...