物种起源 wùzhǒngqǐyuán On the Origin of Species Origin Definitions Defs Strokes Stroke Words Sentences Sents 物种 物種 wùzhǒng noun species The basic unit of biological classification, referring to a group of living things with similar physical and physiological characteristics that can breed together to produce fertile offspring.起源 qǐyuán nounverb origin origin; genesis; the point at which something begins