plural dicotyledons
Definition of dicotyledon
: any of a class or subclass (Magnoliopsida or Dicotyledoneae) of angiospermous plants that produce an embryo with two cotyledons and usually have floral organs arranged in cycles of four or five and leaves with reticulate venation
— called also dicot
— compare monocotyledonTest Your Vocabulary
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Merriam-Webster unabridged
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Time Traveler for dicotyledon
The first known use of dicotyledon was in 1725
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