An Etymological Dictionary of Astronomy and Astrophysics
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Of or relating to an optical system which is capable of transmitting light without decomposing it into constituent colors.

→ a-; → chromatic.

Lens (or combination of lenses) that brings different wavelengths within a ray of light to a single focus, thus overcoming chromatic aberration.

→ achromatic; → lens.

Corrected for → spherical aberration at two wavelengths or colors and for → chromatic aberration at three wavelengths.

→ apo-; → chromatic.

A lens that is → apochromatic.

→ apochromatic; → lens.

An optical system that is → apochromatic.

→ apochromatic; → system.

Of or relating to color or color phenomena or sensations.

From L. chromaticus, from Gk. khromatikos "relating to color," from khroma, khromat- "color" + → -ic.

From rang, fâm, → chromo-, + -i adj. suffix.

A defect in a lens that causes it to concentrate the various colors in a beam of light at various point, thus producing color fringes.

→ chromatic; → aberration.

Characterized by light of one color or by radiation of a single wavelength or narrow range of wavelengths.

→ mono-; → chromatic.

The sum of → absorption coefficient (κ_ν) and → scattering coefficient (σ_ν) at a given frequency: k_ν = κ_ν + σ_ν. See also the → Rosseland mean opacity.

→ monochromatic; → opacity.

Having or exhibiting a variety of colors.

→ poly-; → chromatic.