| Actinometric |
| Pertaining to the measurement of the intensity of the
solar rays, either (a) heating, or (b) actinic. |
| Actinometry |
| The measurement of the force of solar radiation. |
| Actinometry |
| The measurement of the chemical or actinic energy of
light. |
| Actinophorous |
| Having straight projecting spines. |
| Actinosome |
| The entire body of a coelenterate. |
| Actinost |
| One of the bones at the base of a paired fin of a fish. |
| Actinostome |
| The mouth or anterior opening of a coelenterate
animal. |
| Actinotrocha |
| A peculiar larval form of Phoronis, a genus of
marine worms, having a circle of ciliated tentacles. |
| Actinozoa |
| A group of Coelenterata, comprising the Anthozoa and
Ctenophora. The sea anemone, or actinia, is a familiar example. |
| Actinozoal |
| Of or pertaining to the Actinozoa. |
