exogen
n . 外长植物;双子叶植物
外长植物;双子叶植物
exogen n 1 :
flowering plant with two cotyledons ;
the stem grows by deposit on its outside [
synonym : {
dicot }, {
dicotyledon },
{
magnoliopsid }, {
exogen }]
Exogen \
Ex "
o *
gen \,
n . [
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 .
[
1913 Webster ]
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