Look up mutation in Wiktionary, the free dictionary.
A mutation is a change in the sequence of an organism's genetic material.
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Mutation, mutations, or mutate may also refer to:
A mutation is a change in the sequence of an organism's genetic material.
Mutation, mutations, or mutate may also refer to:
In phonology, an allophone is one of multiple possible spoken sounds – or phones – used to pronounce a single phoneme in a particular language. For example, in English, the voiceless plosive and the aspirated form are allophones for the phoneme, while these two are considered to be different phonemes in some languages such as Central Thai. Similarly, in Spanish, and are allophones for the phoneme, while these two are considered to be different phonemes in English.
Phonetics is a branch of linguistics that studies how humans produce and perceive sounds or, in the case of sign languages, the equivalent aspects of sign. Linguists who specialize in studying the physical properties of speech are phoneticians. The field of phonetics is traditionally divided into three sub-disciplines on questions involved such as how humans plan and execute movements to produce speech, how various movements affect the properties of the resulting sound or how humans convert sound waves to linguistic information. Traditionally, the minimal linguistic unit of phonetics is the phone—a speech sound in a language which differs from the phonological unit of phoneme; the phoneme is an abstract categorization of phones and it is also defined as the smallest unit that discerns meaning between sounds in any given language.
The term phonation has slightly different meanings depending on the subfield of phonetics. Among some phoneticians, phonation is the process by which the vocal folds produce certain sounds through quasi-periodic vibration. This is the definition used among those who study laryngeal anatomy and physiology and speech production in general. Phoneticians in other subfields, such as linguistic phonetics, call this process voicing, and use the term phonation to refer to any oscillatory state of any part of the larynx that modifies the airstream, of which voicing is just one example. Voiceless and supra-glottal phonations are included under this definition.
Radical may refer to:
In linguistics, an alternation is the phenomenon of a morpheme exhibiting variation in its phonological realization. Each of the various realizations is called an alternant. The variation may be conditioned by the phonological, morphological, and/or syntactic environment in which the morpheme finds itself.
Sandhi is any of a wide variety of sound changes that occur at morpheme or word boundaries. Examples include fusion of sounds across word boundaries and the alteration of one sound depending on nearby sounds or the grammatical function of the adjacent words. Sandhi belongs to morphophonology.
Linguistics is the scientific study of human language. Someone who engages in this study is called a linguist. See also the Outline of linguistics, the List of phonetics topics, the List of linguists, and the List of cognitive science topics. Articles related to linguistics include:
In linguistics, lenition is a sound change that alters consonants, making them “weaker” in some way. The word lenition itself means "softening" or "weakening". Lenition can happen both synchronically and diachronically. Lenition can involve such changes as voicing a voiceless consonant, causing a consonant to relax occlusion, to lose its place of articulation, or even causing a consonant to disappear entirely.
Assimilation is a sound change in which some phonemes change to become more similar to other nearby sounds. A common type of phonological process across languages, assimilation can occur either within a word or between words.
Consonant mutation is change in a consonant in a word according to its morphological or syntactic environment.
The glottalic theory is that Proto-Indo-European had ejective or otherwise non-pulmonic stops, *pʼ *tʼ *kʼ, instead of the plain voiced ones, *b *d *ɡ as hypothesized by the usual Proto-Indo-European phonological reconstructions.
Old Irish, also called Old Gaelic, is the oldest form of the Goidelic/Gaelic language for which there are extensive written texts. It was used from c. 600 to c. 900. The main contemporary texts are dated c. 700–850; by 900 the language had already transitioned into early Middle Irish. Some Old Irish texts date from the 10th century, although these are presumably copies of texts written at an earlier time. Old Irish is forebear to Modern Irish, Manx and Scottish Gaelic.
In linguistics, prothesis, or less commonly prosthesis is the addition of a sound or syllable at the beginning of a word without changing the word's meaning or the rest of its structure. A vowel or consonant added by prothesis is called prothetic or less commonly prosthetic.
In linguistics, apophony is an alternation of vowel (quality) within a word that indicates grammatical information.
Tooro or Rutooro is a Bantu language spoken mainly by the Tooro people (Abatooro) from the Tooro Kingdom in western Uganda. There are three main areas where Tooro as a language is mainly used: Kabarole District, Kyenjojo District and Kyegegwa District. Tooro is unusual among Bantu languages as it lacks lexical tone. It is most closely related to Runyoro.
As the Proto-Indo-European language (PIE) broke up, its sound system diverged as well, as evidenced in various sound laws associated with the daughter Indo-European languages. Especially notable is the palatalization that produced the satem languages, along with the associated ruki sound law. Other notable changes include:
In historical linguistics, transphonologization is a type of sound change whereby a phonemic contrast that used to involve a certain feature X evolves in such a way that the contrast is preserved, yet becomes associated with a different feature Y.
O, or o, is the fifteenth letter of the English alphabet.
A phonological rule is a formal way of expressing a systematic phonological or morphophonological process in linguistics. Phonological rules are commonly used in generative phonology as a notation to capture sound-related operations and computations the human brain performs when producing or comprehending spoken language. They may use phonetic notation or distinctive features or both.
Shelia Guberman is a scientist in computer science, nuclear physics, geology, geophysics, medicine, artificial intelligence and perception. He proposed the D-waves theory of Earth seismicity, algorithms of Gestalt-perception (1980) and Image segmentation, and programs for the technology of oil and gas fields exploration (1985).