path·o·bi·ol·o·gy 
(păth′ō-bī-ŏlə-jē)
(păth′ō-bī-ŏlə-jē)n.
1. See pathology.
2. The study or practice of pathology with greater emphasis on the biological aspects than on the medical aspects.
- on the dole
- on the dot
- on the double
- on the drawing board
- on the edge
- on the face of it
- on the fence
- on the fly
- on the front burner
- on the go
- on the ground
- on the heels of
- on the hoof
- on the horns of a dilemma
- on the house
- on the increase
- on the inside
- on the job
- on-the-job
- on the level
- on the line
- on the loose
- on the make
- on the march
- on the market