WebMar 11, 2024 · essential oil, highly volatile substance isolated by a physical process from an odoriferous plant of a single botanical species. The oil bears the name of the plant from which it is derived; for example, rose oil or peppermint oil. Such oils were called essential because they were thought to represent the very essence of odour and flavour. … WebMar 17, 2024 · chemical element, also called element, any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed. This article considers the origin of the elements and their abundances throughout the universe. The geochemical …
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WebMay 23, 2024 · essential (adj.) mid-14c., "that is such by its essence," from Late Latin essentialis, from essentia "being, essence," abstract noun formed (to translate Greek ousia "being, essence") from essent-, present participle stem of esse "to be," from PIE root *es … essence. (n.). late 14c., essencia (respelled late 15c. on French model), from Latin … ESSAY Meaning: "trial, attempt, endeavor," also "short, discursive literary … WebFeb 1, 2024 · key (n.1) key. (n.1) "instrument for opening locks," Middle English keie, from Old English cæg "metal piece that works a lock, key" literal and figurative ("solution, explanation, one who or that which opens the way or explains"), a word of unknown origin, abnormal evolution, and no sure cognates other than Old Frisian kei. easy to build sofa
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Webidentity: [noun] sameness of essential or generic character in different instances. sameness in all that constitutes the objective reality of a thing : oneness. WebJan 11, 2024 · Origin DNA melting is an essential process in the various domains of life. The replication fork helicase unwinds DNA ahead of the replication fork, providing single … WebEtymology (/ ˌ ɛ t ɪ ˈ m ɒ l ə dʒ i / ET-im-OL-ə-jee) is the study of the origin and evolution of a word's semantic meaning across time, including its constituent morphemes … community of place