Growing or existing in pairs; having twin or duplicate structures, especially in botany and anatomy.
From Greek 'didymos' (twin), used directly in scientific English to describe paired or duplicate structures in organisms.
Plants use pairing strategically—'didymous' stamens or other paired plant parts often function as a unit, and botanists realized this pairing was so common they needed a single word to describe it rather than saying 'in pairs' every time.
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