A form of upper jaw mobility, found in some birds and lizards, in which the upper jaw may be raised relative to the neurocranium by rotation about a hinge at their junction, anterior to the eyes.
Origin
1960s. From pro- + kinesis, after prokinetic.
Definition of prokinesis in US English:
prokinesis
noun
Zoology
A form of upper jaw mobility, found in some birds and lizards, in which the upper jaw may be raised relative to the neurocranium by rotation about a hinge at their junction, anterior to the eyes.