sub·pop·u·la·tion 
(sŭb′pŏp-yə-lāshən)
(sŭb′pŏp-yə-lāshən)n.
A part or subdivision of a population, especially one originating from some other population: microbial subpopulations.
- collagenase
- collagenic
- collagenous
- collagen vascular disease
- collagist
- collapse
- collapsibility
- collapsible
- collar
- collarbone
- collar cell
- collard
- collard greens
- collards
- collared
- collared peccary
- collate
- collateral
- collateral damage
- collateralization
- collateralize
- collateralized debt obligation
- collaterally
- collation
- collator