volatile oils

volatile oils
Essential Es*sen"tial ([e^]s*s[e^]n"sjal), a. [Cf. F. essentiel. See {Essence}.] 1. Belonging to the essence, or that which makes an object, or class of objects, what it is. [1913 Webster]

Majestic as the voice sometimes became, there was forever in it an essential character of plaintiveness. --Hawthorne. [1913 Webster]

2. Hence, really existing; existent. [1913 Webster]

Is it true, that thou art but a name, And no essential thing? --Webster (1623). [1913 Webster]

3. Important in the highest degree; indispensable to the attainment of an object; indispensably necessary. [1913 Webster]

Judgment's more essential to a general Than courage. --Denham. [1913 Webster]

How to live? -- that is the essential question for us. --H. Spencer. [1913 Webster]

4. Containing the essence or characteristic portion of a substance, as of a plant; highly rectified; pure; hence, unmixed; as, an essential oil. ``Mine own essential horror.'' --Ford. [1913 Webster]

5. (Mus.) Necessary; indispensable; -- said of those tones which constitute a chord, in distinction from ornamental or passing tones. [1913 Webster]

6. (Med.) Idiopathic; independent of other diseases. [1913 Webster]

{Essential character} (Biol.), the prominent characteristics which serve to distinguish one genus, species, etc., from another.

{Essential disease}, {Essential fever} (Med.), one that is not dependent on another.

{Essential oils} (Chem.), a class of volatile oils, extracted from plants, fruits, or flowers, having each its characteristic odor, and hot burning taste. They are used in essences, perfumery, etc., and include many varieties of compounds; as {lemon oil} is a terpene, {oil of bitter almonds} an aldehyde, {oil of wintergreen} an ethereal salt, etc.; -- called also {volatile oils} in distinction from the fixed or nonvolatile. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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  • Volatile oils — Volatile Vol a*tile, a. [F. volatil, L. volatilis, fr. volare to fly, perhaps akin to velox swift, E. velocity. Cf. {Volley}.] 1. Passing through the air on wings, or by the buoyant force of the atmosphere; flying; having the power to fly. [Obs.] …   The Collaborative International Dictionary of English

  • volatile oils — see ↑essential oils under ↑essence • • • Main Entry: ↑volatile …   Useful english dictionary

  • Volatile — Vol a*tile, a. [F. volatil, L. volatilis, fr. volare to fly, perhaps akin to velox swift, E. velocity. Cf. {Volley}.] 1. Passing through the air on wings, or by the buoyant force of the atmosphere; flying; having the power to fly. [Obs.] [1913… …   The Collaborative International Dictionary of English

  • Volatile alkali — Volatile Vol a*tile, a. [F. volatil, L. volatilis, fr. volare to fly, perhaps akin to velox swift, E. velocity. Cf. {Volley}.] 1. Passing through the air on wings, or by the buoyant force of the atmosphere; flying; having the power to fly. [Obs.] …   The Collaborative International Dictionary of English

  • Volatile liniment — Volatile Vol a*tile, a. [F. volatil, L. volatilis, fr. volare to fly, perhaps akin to velox swift, E. velocity. Cf. {Volley}.] 1. Passing through the air on wings, or by the buoyant force of the atmosphere; flying; having the power to fly. [Obs.] …   The Collaborative International Dictionary of English

  • OILS — (Heb. יִצְהָר ;שֶׁמֶן, new oil ; תַּמְרוּק, מֶרְקָחָה, ointment ), unctuous, inflammable substances, usually liquid, obtained from animal, vegetable, or mineral matter. In Job 29:6 and Deuteronomy 32:13, the references to oil flowing from rocks… …   Encyclopedia of Judaism

  • volatile oil — n an oil that vaporizes readily esp ESSENTIAL OIL compare FATTY OIL * * * an oil that evaporates readily; such oils are usually found in aromatic plants, to which they give odor and other characteristics. Most consist of a mixture of two or more… …   Medical dictionary

  • Volatile anaesthetic — The volatile anaesthetics are a class of general anaesthetic drugs. They share the property of being liquid at room temperature, but evaporating easily for administration by inhalation (some experts make a distinction between volatile and gas… …   Wikipedia

  • volatile oil — /vɒlətaɪl ˈɔɪl/ (say voluhtuyl oyl) noun a distilled oil, especially an essential oil distilled from plant tissue. Such oils are distinguished from glyceride oils by their volatility and failure to saponify …  

  • Volatile alkali — Alkali Al ka*li (?; 277), n.; pl. {Alkalis} or {Alkalies}. [F. alcali, ultimately fr. Ar. alqal[=i] ashes of the plant saltwort, fr. qalay to roast in a pan, fry.] 1. Soda ash; caustic soda, caustic potash, etc. [1913 Webster] 2. (Chem.) One of a …   The Collaborative International Dictionary of English

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