x anterior_to y iff x is further along the antero-posterior axis than y, towards the head. An antero-posterior axis is an axis that bisects an organism from head end to opposite end of body or tail: bearer.

x anterior to y iff x is further along the antero-posterior axis than y, towards the head. An antero-posterior axis is an axis that extends through an organism from head end to opposite end of body or tail.

Synonyms: rostral_to