(chemistry, physics) That property of electromagnetic radiation that leads to the production of photochemical effects

plural of actinism

Of or relating to actinism.

(biochemistry, uncountable) A globular structural protein that polymerizes in a helical fashion to form an actin filament (or microfilament). / (biochemistry, countable) One of the six isoforms of actin.

In an actinic manner.

(zoology) Pertaining to the side or surface around the mouth in an animal that has radial symmetry such as a starfish. / (zoology) Pertaining to the axis of rotational symmetry in radiate animals.

plural of actin

Alternative form of actino-

Pronunciation spelling of acting.

In an actinal manner.