Any of various compounds of a ferrous or ferric ion and a porphyrin, present in biological pigments.
| 单词 | θ17909 | 
| 释义 | the world > life > biology > substance > pigment > 			[noun]		 > human or animal pigments > constituents of (1)		 haem1948 Any of various compounds of a ferrous or ferric ion and a porphyrin, present in biological pigments.  | 
	
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