*1 a (1) : having the property of transmitting light without appreciable scattering so that bodies lying beyond are seen clearly : pellucid (2) : allowing the passage of a specified form of radiation (as X-rays or ultraviolet light) | *1 a (1) : having the property of transmitting light without appreciable scattering so that bodies lying beyond are seen clearly : pellucid (2) : allowing the passage of a specified form of radiation (as X-rays or ultraviolet light) |