plural monocotyledons
: any of a class or subclass (Liliopsida or Monocotyledoneae) of chiefly herbaceous angiospermous plants having an embryo with a single cotyledon, usually parallel-veined leaves, and floral organs arranged in cycles of three

called also monocot

compare dicotyledon

Word History

Etymology

ultimately from New Latin mon- + cotyledon cotyledon

First Known Use

circa 1727, in the meaning defined above

Time Traveler
The first known use of monocotyledon was circa 1727

Browse Nearby Words

Cite this Entry

“Monocotyledon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/monocotyledon. Accessed 26 Mar. 2025.

Kids Definition

monocotyledon

noun
: any of a group of flowering plants (as the palms and grasses) having an embryo with a single cotyledon and usually leaves with parallel veins and flower parts in groups of three compare dicotyledon
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