[spesh-uh-lahyz] 
verb, -ized, -iz⋅ing.| 1. | to pursue some special line of study, work, etc.; have a specialty: The doctor specializes in gastroenterology. |
| 2. | Biology. (of an organism or one of its organs) to be adapted to a special function or environment. |
| 3. | to render special or specific; invest with a special character, function, etc. |
| 4. | to adapt to special conditions; restrict to specific limits. |
| 5. | to restrict payment of (a negotiable instrument) by endorsing over to a specific payee. |
| 6. | to specify; particularize. |
specialize spe·cial·ize (spěsh'ə-līz')
v. spe·cial·ized, spe·cial·iz·ing, spe·cial·iz·es
To limit one's profession to a particular specialty or subject area for study, research, or treatment.
To adapt to a particular function or environment.
əˌlaɪz