A secondary or subordinate field or area of study, research, etc.
| 单词 | θ180643 | 
| 释义 | society > education > learning > study > subject or object of study > 			[noun]		 > ancillary subject (2)		 subfield1894 A secondary or subordinate field or area of study, research, etc. tool subject1934 a subject taught or studied as a help to a main subject. | 
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