Definition of ecodoomster in English:

ecodoomster

noun

informal, derogatory
  • A person who makes pessimistic forecasts about the environment; a prophet of ecodoom.

Origin

1970s; earliest use found in The Times.

Pronunciation

ecodoomster

/ˌiːkəʊˈduːmstə/ /ˌɛkəʊˌduːmstə/