anallantoic
|an-al-lan-to-ic|
C2
🇺🇸
/ˌæn.ə.lænˈtoʊ.ɪk/
🇬🇧
/ˌæn.ə.lænˈtəʊ.ɪk/
lacking an allantois
Etymology
Etymology Information
'anallantoic' originates from Greek, specifically the prefix 'an-' meaning 'not' and 'allantois,' which refers to a fetal membrane.
Historical Evolution
'anallantoic' was formed in modern scientific English by combining the prefix 'an-' with 'allantois' to describe organisms lacking this membrane.
Meaning Changes
Initially, it meant 'not having an allantois,' and this meaning has remained unchanged in scientific usage.
Meanings by Part of Speech
Adjective 1
lacking an allantois (a fetal membrane) during embryonic development.
The embryos of some reptiles are anallantoic.
Synonyms
Antonyms
Last updated: 2025/07/28 14:06