If we had one one eye, one hand, and one leg, then several possibilities would exist. First, we introduce some notation. ER and EL mean the right and left eye respectively. HR and HL represent the right and left hand respectively. Whereas LR and LL denote the right and left legs respectively.
The following combinations are possible
ER-HR-LR: This means that one has the right eye, the right hand, and the right leg.
ER-HR-LL –> The right eye, right hand, and the left leg.
Similarly one can discover the other combinations.
A species that has this characteristic would be called unicreature. It may be called a generalized unicorn.
Mr. Monologue 
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