An ethnic Even: a member of an indigenous people living in Siberia and the Russian Far East.

(rail transport, uncountable) A wheel arrangement for diesel and electric locomotives with two three-axle bogies / trucks, the two outer axles of each bogie are powered and the centre axle is unpow...

(genetics) A sequence of bases (in a nucleic acid) that is absent in one species (especially human) but may be present in others.

(biology) polyspermy / (pathology) An abnormally profuse production of semen