Endo
/ˈɛn.doʊ/noun
A prefix meaning "inside" or "within," used in scientific and technical terms.
Did you know?The prefix comes from Greek and appears in words like *endocrine* and *endoskeleton*, where it marks what is concealed or internal rather than openly visible.
Etymological Timeline
Ancient Greek
Greek
éndon
“inside; within”
Late Greek
Greek
éndo-
“a combining form meaning within, inside”
Scientific Latin
Latin
endo-
“prefix used in learned compounds to mean inside or inward”
Modern English
English
endo
“a prefix meaning inside or within, especially in scientific terms”
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