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The deep time of Earth's past is divided into units according to events that took place in each period. For example, the boundary between the Cretaceous period and the Paleogene period is defined by the Cretaceous–Paleogene extinction event. The largest unit is the supereon, composed of eons.
Meaning Origin language and etymology Example(s) dacry(o)-of or pertaining to tears: Greek δάκρυ, tear dacryoadenitis, dacryocystitis-dactyl(o)-of or pertaining to a finger, toe Greek δάκτυλος (dáktulos), finger, toe dactylology, polydactyly: de-from, down, or away from Latin de-dehydrate, demonetize, demotion dent-
Period 4 includes the biologically essential elements potassium and calcium, and is the first period in the d-block with the lighter transition metals. These include iron , the heaviest element forged in main-sequence stars and a principal component of the Earth, as well as other important metals such as cobalt , nickel , and copper .
Period (music), a concept in musical composition; Periodic sentence (or rhetorical period), a concept in grammar and literary style. Period, a descriptor for a historical or period drama; Period, a timeframe in which a particular style of antique furniture or some other work of art was produced, such as the "Edwardian period"
Synonym list in cuneiform on a clay tablet, Neo-Assyrian period [1] A synonym is a word, morpheme, or phrase that means precisely or nearly the same as another word, morpheme, or phrase in a given language. [2] For example, in the English language, the words begin, start, commence, and initiate are all synonyms of one another: they are ...
When a sentence ends with ellipsis, some style guides indicate there should be four dots; three for ellipsis and a period. Chicago advises it, [10] as does the Publication Manual of the American Psychological Association (APA style), [11] while some other style guides do not; the Merriam-Webster Dictionary and related works treat this style as ...
For example, screening for breast cancer can be impacted by where a woman is in her menstrual cycle. “Your breasts may feel more lumpy at certain points of your cycle compared to others,” Teen ...
A thesaurus (pl.: thesauri or thesauruses), sometimes called a synonym dictionary or dictionary of synonyms, is a reference work which arranges words by their meanings (or in simpler terms, a book where one can find different words with similar meanings to other words), [1] [2] sometimes as a hierarchy of broader and narrower terms, sometimes simply as lists of synonyms and antonyms.