hemal arch

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Noun1.hemal arch - a structure arising ventrally from a vertebral centrum and enclosing the caudal blood vessels
centrum - the main body of a vertebra
References in periodicals archive ?
abaster only one hemal arch can be distinguished and lateral processes are doubled.
The hemal arch is like that of the first gonapophys.
The third gonapophys presents no clearly developed process, however the area between the body and the hemal arch forms an obtuse angle with a notable, sharp apex.