| ACTINIAE | • actiniae n. Plural of actinia. • ACTINIA n. (Greek) a sea-anemone, also ACTINIAN. |
| ACTINIAN | • actinian n. A sea anemone (of the order Actiniaria). • ACTINIAN n. a sea-anemone, also ACTINIA. |
| ACTINIAS | • actinias n. Plural of actinia. • ACTINIA n. (Greek) a sea-anemone, also ACTINIAN. |
| ACTINIDE | • actinide n. (Chemistry) Any of the 15 radioactive elements of the periodic table from actinium to lawrencium that… • actinide n. (Chemistry) Any of the 14 elements from actinium to nobelium (lawrencium is excluded by some authors… • actinide n. (Chemistry, dated) Any of the 14 elements from thorium to lawrencium (actinium having been mistakenly… |
| ACTINISM | • actinism n. (Chemistry, physics) That property of electromagnetic radiation that leads to the production of photochemical effects. • ACTINISM n. the property of radiant energy that effects chemical changes. |
| ACTINIUM | • actinium n. A radioactive, metallic chemical element (symbol: Ac) with an atomic number of 89; found in uranium ores. • ACTINIUM n. a radioactive metallic chemical element, atomic number 89, the first element of the actinide series. |
| ACTINOID | • actinoid n. (Inorganic chemistry) actinide. • actinoid adj. Having the form of rays; radiated, as in the species of the family Actiniidae. • ACTINOID n. any element of a group from element number 89 (actinium) upwards, also ACTINIDE. |
| ACTINONS | • actinons n. Plural of actinon. • ACTINON n. an isotope of radon. |
| COACTING | • coacting v. Present participle of coact. • COACT v. to act together. |
| DIACTINE | • diactine adj. Diactinal; having two rays. • diactine n. A spicule (of a sponge) that has two pointed arms. • DIACTINE n. a sponge spicule having two rays that develop in different directions from a single point of origin, also DIACT. |
| ENACTING | • enacting v. Present participle of enact. • enacting n. Enactment. • ENACT v. to establish by law. |
| EXACTING | • exacting adj. Making great demands; difficult to satisfy. • exacting adj. (Of an action, task, etc) Requiring precise accuracy, great care, effort, or attention. • exacting adj. (Of a person or organization) Characterized by exaction. |
| FRACTING | • fracting n. Alternative form of fracking. • FRACT v. to break; to violate. |
| REACTING | • reacting v. Present participle of react. • reäcting v. Present participle of reäct. • REACT v. to respond to a stimulus. |
| TRACTING | • tracting v. Present participle of tract. • TRACT v. (Spenser) to trace, track. |