spe·cial·ism 
(spĕshə-lĭz′əm)
(spĕshə-lĭz′əm)n.
1. Concentration of one's efforts in a given occupation or field of study.
2. A field of specialization.
- pick-me-up
- pick nits
- pick off
- pickoff
- pick on
- pick (one's) way
- pick one's way
- pick out
- pick over
- pickpocket
- pickproof
- Pick's disease
- Pick's disease
- pick someone's brain
- pick (someone's)brain/brains
- pick (someone's) brain/brains
- pick someone's brains
- pick (someone) to pieces
- pick someone to pieces
- pick to pieces
- pick up
- pickup
- pick up on
- pick-up stick
- pickup truck