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a substance, as a chemical, used to control or regulate:
herbicides and fungicides as regulants for plant growth.


Read Also:

  • Regular

    adjective 1. usual; normal; customary: to put something in its regular place. 2. evenly or uniformly arranged; symmetrical: regular teeth. 3. characterized by fixed principle, uniform procedure, etc.: regular income. 4. recurring at fixed times; periodic: regular bus departures; regular meals. 5. rhythmical: regular breathing. 6. occurring with normal frequency, as menses or bowel movements. […]

  • Regular-army

    noun 1. the permanent army maintained in peace as well as in war; the standing army: one of the major components of the Army of the United States.

  • Regular as clockwork

    see: like clockwork

  • Regular astigmatism

    regular astigmatism reg·u·lar astigmatism (rěg’yə-lər) n. Astigmatism in which the curvature in each meridian is equal throughout its course, and the meridians of greatest and least curvature are at right angles to each other.

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