actino-, actin-, actini-, -actinal, actis- (Greek: ray [as of light], radiance, radiating or tentacled structure).
The region from which the rays or tentacles grow on a radiate animal.
Having a radial form; rayed.
The study of the effects of radiation on living organisms.
Radio dermatitis (skin inflammation).
Inflammation of the skin as a result of exposure to sunlight or because of adverse reaction to radiation-skin therapy.
A red respiratory pigment found in certain forms of Actina (sea anemones).
1. The science of photochemistry or the science of the chemical effects of light.
2. The study of radiant energy.
An instrument for measuring the intensity and penetrating power of actinic rays. Also actinometry.
Having radial symmetry, as a flower or a starfish.
Radial symmetry in flowers.
The treatment of a disease with ultraviolet or actinic rays.
A crude poison derived from alcoholic extracts of the tentacles of sea anemones.
Saltwater animals, such as corals, sea anemones, sea fans, etc.