EXOGEN
dicot, dicotyledon, magnoliopsid, exogen
(noun) flowering plant with two cotyledons; the stem grows by deposit on its outside
Source: WordNet® 3.1
Etymology
Noun
exogen (plural exogens)
(botany) A plant characterized by wood, bark and pith, the wood forming a layer between the other two, and growth only occurring on the outside.
Source: Wiktionary
Ex"o*gen, n. Etym: [Exo- + -gen: cf. F. exogène.] (Bot.)
Definition: A plant belonging to one of the greater part of the vegetable
kingdom, and which the plants are characterized by having c wood
bark, and pith, the wood forming a layer between the other two, and
increasing, if at all, by the animal addition of a new layer to the
outside next to the bark. The leaves are commonly netted-veined, and
the number of cotyledons is two, or, very rarely, several in a whorl.
Cf. Endogen. Gray.
Source: Webster’s Unabridged Dictionary 1913 Edition