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exogen

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

Exogen \Ex"o*gen\, noun [Exo- + -gen: cf. F. exog['e]ne.] (Bot.) 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.

From WordNet (r) 3.0 (2006) [wn]:

exogen

noun

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


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