Early 19th century; earliest use found in John Macculloch (1773–1835), surgeon and geologist. From Hellenistic Greek ὀψιγαμία marriage late in life from ὀψίγαμος late-married + -ία.
Definition of opsigamy in US English:
opsigamy
nounɒpˈsɪɡəmi
rare
Marriage late in life.
Origin
Early 19th century; earliest use found in John Macculloch (1773–1835), surgeon and geologist. From Hellenistic Greek ὀψιγαμία marriage late in life from ὀψίγαμος late-married + -ία.