American Heritage® Dictionary of the English Language, Fourth Edition
- n. A flowering plant with two embryonic seed leaves or cotyledons that usually appear at germination.
Century Dictionary and Cyclopedia
- n. A plant which produces an embryo having two cotyledons. Dicotyledons form a natural class of the phænogamous series of plants, characterized by the two opposite cotyledons, an exogenous mode of growth, and a netted venation of the leaves, and by seldom having a trimerous arrangement of the parts of the flower. From the structure of the stem, increasing by external growth, they are also known as exogens. The gymnosperms, in which the embryo has several cotyledons in a whorl, are usually included as a subclass, but by some recent botanists they are ranked as a distinct class. According to the more usual arrangement, the angiospermous dicotyledons are divided by the characters of the perianth into Polypetalæ, Gamopetalæ, and Apetalæ or Monochlamydeæ These are subdivided into 164 orders. Several modifications of this system have been adopted, especially by continental European botanists, the most important of which is the distribution of the apetalous orders among the two other divisions. The total number of species of dicotyledonous plants now known is about 80,000, included under about 6,000 genera. See
- n. botany A plant whose seedling has two cotyledons.
- n. botany, historical Any plant in what used to be the Dicotyledones.
GNU Webster's 1913
- n. (Bot.) A plant whose seeds divide into two seed lobes, or cotyledons, in germinating.
- n. flowering plant with two cotyledons; the stem grows by deposit on its outside
- From di- ("two") + cotyledon ("embryonic leaf"). (Wiktionary)
“cotyledon" and "dicotyledon" -- I should not have been surprised; but they blundered over the ordinary English, and had next to no sense of the meaning of punctuation.”
“In the Border Ranges, approximately 140 dicotyledon genera are Gondwanan in origin, including rain forest genera (Nothofagus, Ceratopetalum, Akania) and non-rainforest genera such as Cassinia, Bauera, Hibbertia, and Leucopogon.”
“One of these determinables is number of cotyledons under which fall the determinates acotyledon, monocotyledon, and dicotyledon.”
“I will describe as examples the reproduction of a moss, a fern, and a dicotyledon.”
“Beginning with the cryptogams, the system proceeds from the monocotyledon to the dicotyledon, and closes with the coniferæ.”
“A primrose by the river's brim," whether "a yellow primrose 'tis to him," or a dicotyledon, may be outwardly described more and less well; but we require for that purpose only the rudiments of literary prose.”
“Mammal, amphibian, coleoptera, dicotyledon, cryptogam, -- all these terms, which, if they were translated into the language of a peasant, would be seen to record very simple observations, yet do lend a kind of formal majesty to ignorance.”
“Nothing could be more useful than botany-those who could not distinguish between a dicotyledon and a monocotyledon could certainly never rightly grasp the nature of a hedgerow.”
“-- The engraving conveys the impression that the leaves are parallel-veined; but the coca is a dicotyledon, with the under surface of the leaf strongly marked with veins, of which two, in addition to the midrib, run parallel with the margin.”
“They have a double seed-leaf which means they are a dicotyledon.”
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