Definition of opsimath in English:

opsimath

noun

rare
  • A person who begins to learn or study only late in life.

    • ‘I am proud to call myself an opsimath.’

Origin

Late 19th century: from Greek opsimathēs, from opse late + the stem math- learn.

Pronunciation:

opsimath

/ˈɒpsɪmaθ/