actinic
UK[ækˈtɪnɪk]US[ækˈtɪnɪk]
adj
relating to or resulting from the radiation of light, especially ultraviolet light or sunlight.
Morpheme Breakdown
actin
ic
actin
ray
ic
adjective suffix
Etymology
the word 'actinic' is a scientific term formed in the 19th century to describe chemical or biological effects produced by radiant energy, particularly light. it is built directly upon the greek root 'aktin-', meaning 'ray' or 'beam', which is also the source of words like 'actinism' and 'actinium'. the suffix '-ic' is a common adjectival ending borrowed via latin from greek, used to form words meaning 'of or pertaining to'. thus, the literal construction 'pertaining to rays' evolved into its precise modern meaning, specifying the photochemical properties of light, especially the blue and ultraviolet parts of the spectrum.
Analysis
Structure: actin (ray) + ic (adjective suffix)
actin originates from greek 'aktis, aktinos' meaning 'ray, beam'. ic is an english adjective-forming suffix derived from latin '-icus' and greek '-ikos', meaning 'pertaining to'.
Examples
actinic radiation from the sun can cause damage to the skin and eyes.
the material is treated to be resistant to actinic degradation.
photographers use filters to reduce actinic effects in certain lighting conditions.