• WordNet 3.6
    • n Monocotyledones comprising seed plants that produce an embryo with a single cotyledon and parallel-veined leaves: includes grasses and lilies and palms and orchids; divided into four subclasses or superorders: Alismatidae; Arecidae; Commelinidae; and Liliidae
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Century Dictionary and Cyclopedia
    • n monocotyledones A natural class of flowering plants, having a single seed-leaf or cotyledon in the embryo. They have generally the parts of their flowers in threes (not in fives, as in dicotyledons), their earliest leaves alternate, and the veins parallel. From the structure of the stem, increasing by internal or endogenous growth, they are also called endogens. The wood of their stems occurs in longitudinal bundles of fibers, scattered, as in Indian corn, or becoming compact, as in palms. New bundles of fibers form between the old, not, as in dicotyledons or exogens, in an annual external layer enveloping the stem. The class is divided into 34 orders, among which are the lily, iris, amaryllis, orchis, banana, palm, pineapple, screwpine, arum, rush, sedge, and grass families. By Bentham and Hooker these are classed in seven groups or series; by-others in three, the spadiceous, petaloideous, and glumaceous divisions. About 20,000 species are known, included in about 1,500 genera.
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In literature:

It must be admitted that the whole question of the evolution of Monocotyledons remains to be solved.
"Darwin and Modern Science" by A.C. Seward and Others
Reflect on the monocotyledonous plant just discovered in the PRIMORDIAL formation in Sweden.
"The Life and Letters of Charles Darwin, Volume II (of II)" by Charles Darwin
But, above everything, such a proportion of individual monocotyledons!
"More Letters of Charles Darwin Volume II" by Charles Darwin
This will bring up the terms dicotyledon and monocotyledon.
"Outlines of Lessons in Botany, Part I; From Seed to Leaf" by Jane H. Newell
In the smaller group, the Monocotyledons, the bundles are more numerous in the young stem and scattered through the ground tissue.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1" by Various
Are the sheaths found on certain radicles strictly confined to monocotyledonous plants.
"Journals of Travels in Assam, Burma, Bhootan, Afghanistan and TheNeighbouring Countries" by William Griffith
The colchiceae, from which is obtained veratrine, form an exception among the monocotyledons.
"Scientific American Supplement, No. 623, December 10, 1887" by Various
The monocotyledons comprise many familiar plants, both ornamental and useful.
"Elements of Structural and Systematic Botany" by Douglas Houghton Campbell
Intermediate forms connected each of these types with those of monocotyledonous trees.
"On the Old Road, Vol. 2 (of 2)" by John Ruskin
Prof. A. Braun remarks that up to this date no such change has been observed in the ovules of Monocotyledons.
"Vegetable Teratology" by Maxwell T. Masters
The shoots and roots of grasses conform in their internal structure to the monocotyledonous type.
"A Handbook of Some South Indian Grasses" by Rai Bahadur K. Ranga Achariyar
All these samples of trunks whether monocotyledons or dicotyledons, should not be boxed or sent off before they are perfectly dry.
"Movement of the International Literary Exchanges, between France and North America from January 1845 to May, 1846" by Various
Saxifragaceae (trees) 2 MONOCOTYLEDONS.
"Island Life" by Alfred Russel Wallace
A family of tropical monocotyledonous plants, including the banana and plantains.
"Principles of Geology" by Charles Lyell
Monocotyledons containing about 1000 species in 105 genera.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 6" by Various
Brongniart entertains some doubt even as to their being monocotyledons.
"A Manual of Elementary Geology" by Charles Lyell
A few palms appeared almost as early, and some other monocotyledons.
"The Religion of Geology and Its Connected Sciences" by Edward Hitchcock
The one seed-leaf plants (monocotyledons) include the grasses, lilies, bananas, palms, etc.
"Wood and Forest" by William Noyes
The monocotyledons yield still more complex fibre aggregates, which are the fibro-vascular bundles of leaves and stems.
"Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 3" by Various
To other monocotyledonous families the resemblances are merely of adaptive or vegetative characters.
"Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3" by Various