Amnios
/ˈæm.ni.ɒs/noun
A variant form of amnion, the membrane surrounding an embryo or fetus.
Did you know?The origin of Greek amnion is uncertain, but ancient writers connected it with the membrane surrounding a fetus, while some scholars have proposed a relationship to Greek amnos, meaning “lamb.”
Etymological Timeline
Ancient Greek
Greek
ἀμνίον (amnion)
“A membrane surrounding a fetus; the exact origin is uncertain.”
Ancient Greek
Greek
ἀμνός (amnos)
“Lamb; a proposed, though debated, source or associate of amnion.”
2nd Century
Latin
amnion
“The fetal membrane, adopted into medical Latin.”
17th Century
English
amnion
“The innermost membrane enclosing the embryo or fetus.”
19th Century
English
amnios
“A variant anatomical form of amnion.”