[spec.tro.he.lio.scope] n [ISV] (1906) 1: spectroheliograph
2: an instrument similar to a spectroheliograph used for visual as distinguished from photographic observations
[spec.tro.he.lio.scope] n [ISV] (1906) 1: spectroheliograph
2: an instrument similar to a spectroheliograph used for visual as distinguished from photographic observations
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012