Relating to or denoting presentation of a fetus in which the rear or caudal end is nearest the cervix and emerges first at birth.
Following in order or in time.
Next to, or facing the main stem or axis.
The hinder parts of the body.
The probability that a hypothesis is true (calculated by Bayes' theorem).
Of an animal or reptile having a yellow underside or belly.
Uncourageous, cowardly.