Natural family planning
noun
a method for preventing pregnancy with drugs or devices but rather based on the rhythm method, basal body temperature, or the cervical mucus method
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noun a flavor-enhancing substance made from the chemical extracts of natural sources (animals, plants, etc.) Examples artificial flavors are considered somewhat safer to consume than natural flavors due to the standards of purity and mixture consistency that are enforced either by the company or by law.
- Natural frequency
noun 1. (physics) the frequency at which a system vibrates when set in free vibration Compare forcing frequency
- Natural-gas
noun 1. a combustible mixture of gaseous hydrocarbons that accumulates in porous sedimentary rocks, especially those yielding petroleum, consisting usually of over 80 percent methane together with minor amounts of ethane, propane, butane, nitrogen, and, sometimes, helium: used as a fuel and to make carbon black, acetylene, and synthesis gas. noun 1. a gaseous mixture […]
- Natural-harmonics
noun, (used with a plural verb) Music. 1. harmonics of a note produced on a stringed instrument by lightly touching an open or unstopped sounded string.
- Natural-gender
noun, Grammar. 1. gender based on the sex or, for neuter, the lack of sex of the referent of a noun, as English girl (feminine) is referred to by the feminine pronoun she, boy (masculine) by the masculine pronoun he, and table (neuter) by the neuter pronoun it. noun 1. grammatical gender that reflects, as […]