Final answer:
The name "orrorin tugenensis" is a combination of two words: orrorin and tugenensis. The nickname "millimium man" is a reference to the species' position in human evolution and its significance in understanding the origins of our ancestors.
Step-by-step explanation:
The name "orrorin tugenensis" is a combination of two words: orrorin and tugenensis. The word "orrorin" is derived from the Tugen people of Kenya, where the fossils of this species were first discovered. The word "tugenensis" refers to the Tugen Hills, which is the specific location of the discovery. The nickname "millimium man" is a reference to the species' position in human evolution and its significance in understanding the origins of our ancestors.