Read Edit View history 生长素 shēngzhǎngsù auxin Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 生长素/ 生長素 shēngzhǎngsù auxin noun · auxin (plant growth hormone) 这种植物生长素能促进根系的生长。 Edit Delete References Add reference No references for this word.