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endogenous
Definitions
1
adjective
Originating
from
within
an
organism
,
tissue
,
or
cell
.
The
hormone
insulin
is
endogenous
to
the
pancreas
.
Endogenous
factors
can
influence
the
growth
of
a
plant
.
The
study
focused
on
endogenous
rhythms
in
animals
.
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Word Origin
Language
Greek
Original word
endogenēs
Word parts
endo (within) + genēs (born, produced)
Originally meant
born from within
Background
The term 'endogenous' was first used in the early 19th century in scientific contexts to describe processes or substances that originate from within an organism.