Definitions

1. adjective

relating to or denoting the lower or second pair of branchial arches in a vertebrate embryo.

“The hypohyal cartilage is a key structure in the development of the vertebrate skull.”

2. noun

a cartilage or bone that is part of the second branchial arch in a vertebrate embryo.

“The hypohyals are a pair of cartilages found in the embryonic throat.”