exogen
- noun
- /ˈɛksoʊdʒən/
- Specialized
:
exógeno
- Unlike an endogen, an exogen adds new wood to the outside of its trunk each year.
Examples
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The oak tree is classified as an exogen due to its method of stem growth.
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Many familiar trees, such as the maple and elm, are examples of exogens.
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An exogen is characterized by its two cotyledons.
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The exogen plant family includes many familiar species.
-
The oak tree is classified as an exogen due to its method of stem growth.
-
Many familiar trees, such as the maple and elm, are examples of exogens.
-
Unlike an endogen, an exogen adds new wood to the outside of its trunk each year.
Synonyms
1
9.9
A flowering plant with two seed leaves inside its seed
1
9.1
A plant that makes flowers and whose seeds have two small leaves inside
A flowering plant with two seed leaves that grows by adding new layers on the outside
Surface Forms
Morphology
exogen = exo + gen
Although analyzable as the combining forms exo- (outside) + -gen (born/produced), these are technical Greek combining forms not productive standalone English words, so a B1 learner would not reliably derive the botanical meaning.
Etymology
Exogen comes from the parts exo- meaning 'outside' and -gen meaning 'born' or 'produced', like the exo- in external and the gen in generate. So an exogen is a plant that makes new wood on the outside of its stem, which is why many common trees are called exogens.