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The concept of chreod was introduced in 1957 by the English theoretical biologist Conrad Hal Waddington (cf. Waddington: 1957; Galperin: 2008). From a linguistic point of view, the word “chreod” is a neologism, or, more precisely, a compound formed by the combination of two Greek words: the verb chre- (“it is necessary, must”) and the substantive -hodos (“way, road”).Therefore, it means literally “obliged pathway” (cf. Fabris 2018: 252, n. 6). Of course, such an etymology covers only a little bit of the semantic repertoire deployed by chreod. But, it is however true that some aspects of the biology of living systems can be described in these terms. Indeed, at the most general level, the idea of chreod as “obliged pathway” finds a good empirical fit to the morphological development of embryonic tissues. With particular reference to this point, it is common to define a chreod as “an orderly sequence of developmental stages”.
Lingua originaleEnglish
Titolo della pubblicazione ospiteGlossary of Morphology, Springer.
Numero di pagine5
Stato di pubblicazionePublished - 2020

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