Early 17th century; earliest use found in Thomas Coryate (?1577–1617), traveller and writer. From Middle French, French Observantin from observant + -in.
Definition of Observantine in US English:
Observantine
noun
historical
Observant.
adjective
historical
Observant.
Origin
Early 17th century; earliest use found in Thomas Coryate (?1577–1617), traveller and writer. From Middle French, French Observantin from observant + -in.