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外激素
wàijīsù
1. pheromone

Character Breakdown

外
wài
out, outside, external; foreign; in addition
HSK 2 5 丶
激
jī
to arouse, to incite; acute, sharp; fierce, violent
HSK 4 16 丶
素
sù
plain; white; vegetarian; formerly; normally
HSK 5 10 丶

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Category
Chinese