subfield
Kelime Anlamı :

1. alt alan.
2. alt cisim.
Tanımlar :
1. A subdivision of a field of study; a subdiscipline.
2. mathematics A field that is a subset of another field.
from The American Heritage® Dictionary of the English Language, 4th Edition
1. A smaller, more specialized area of study or occupation within a larger one
2. A subring of a field, containing the multiplicative identity and closed under inversion.
from Wiktionary, Creative Commons Attribution/Share-Alike License