Definition of microphotogram in US English:

microphotogram

noun

rare
  • A photomicrograph (of a microscopic object or absorption spectrum).

Origin

Late 19th century; earliest use found in Patrick Manson (1844–1922), physician and parasitologist. From micro- + photogram.

Pronunciation

microphotogram

/ˌmʌɪkrə(ʊ)ˈfəʊtəɡram/