AskDefine | Define dicotyledon

Dictionary Definition

dicotyledon n : flowering plant with two cotyledons; the stem grows by deposit on its outside [syn: dicot, magnoliopsid, exogen]

User Contributed Dictionary



  1. Any plant in what used to be the Dicotyledones (also written Dicotyledonae). Dicotyledons and monocotyledons together make up the flowering plants, the angiosperms. Examples of dicotyledons are beans, buttercups, oaks, sunflowers, etc.



in botany

Extensive Definition

Dicotyledons, or "dicots", is a name for a group of flowering plants whose seed typically has two embryonic leaves or cotyledons. There are around 199,350 species within this group Flowering plants that are not dicotyledons are monocotyledons, typically having one embryonic leaf.
The dicotyledons no longer are regarded as a "good" group, and the names "dicotyledons" and "dicots" are no longer to be used at least in a taxonomic sense. The vast majority of the former dicots, however, form a monophyletic group called the eudicots or tricolpates. These may be distinguished from all other flowering plants by the structure of their pollen. Other dicotyledons and monocotyledons have monosulcate pollen, or forms derived from it, whereas eudicots have tricolpate pollen, or derived forms, the pollen having three or more pores set in furrows called colpi.
Traditionally the dicots have been called the Dicotyledones (or Dicotyledoneae), at any rank. If treated as a class, as in the Cronquist system, they may be called the Magnoliopsida after the type genus Magnolia. In some schemes, the eudicots are treated as a separate class, the Rosopsida (type genus Rosa), or as several separate classes. The remaining dicots (palaeodicots) may be kept in a single paraphyletic class, called Magnoliopsida, or further divided.


The following lists are of the orders formerly placed in the dicots, giving their new placement in the APG-system and that under the older Cronquist system, which is still in wide use.
dicotyledon in Arabic: ثنائيات الفلقة
dicotyledon in Bulgarian: Двусемеделни
dicotyledon in Czech: Dvouděložné
dicotyledon in Welsh: Deugotyledon
dicotyledon in Danish: Tokimbladede
dicotyledon in German: Zweikeimblättrige
dicotyledon in Modern Greek (1453-): Δικοτυλήδονο
dicotyledon in Esperanto: Dukotiledonaj plantoj
dicotyledon in French: Dicotylédone
dicotyledon in Korean: 쌍떡잎식물
dicotyledon in Croatian: Dvosupnice
dicotyledon in Icelandic: Tvíkímblöðungar
dicotyledon in Hebrew: דו-פסיגיים
dicotyledon in Latvian: Divdīgļlapji
dicotyledon in Hungarian: Kétszikűek
dicotyledon in Malay (macrolanguage): Dikotiledon
dicotyledon in Dutch: Tweezaadlobbigen
dicotyledon in Japanese: 双子葉植物
dicotyledon in Norwegian: Tofrøbladede planter
dicotyledon in Polish: Dwuliścienne
dicotyledon in Portuguese: Dicotiledónea
dicotyledon in Quechua: Iskay phutuy raphiyuq
dicotyledon in Russian: Двудольные
dicotyledon in Slovenian: Dvokaličnice
dicotyledon in Serbian: Дикотиледоне биљке
dicotyledon in Finnish: Kaksisirkkaiset
dicotyledon in Swedish: Tvåhjärtbladiga
dicotyledon in Vietnamese: Thực vật hai lá mầm
dicotyledon in Ukrainian: Дводольні
dicotyledon in Chinese: 双子叶植物纲

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