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 List of 13-letter words containing •••••••Click to add a ninth letter
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 There are 8 thirteen-letter words containing G, L, N, 3O, R and Y| CHRONOBIOLOGY | • chronobiology n. (Biology) The study of the effects of time on biological systems, especially the effects of periodicity. • CHRONOBIOLOGY n. the study of biological rhythms. |  | ENDOCRINOLOGY | • endocrinology n. (Physiology) The study of the endocrine glands of the human body, the hormones produced by them, and… • ENDOCRINOLOGY n. the study of glands. |  | GEOCHRONOLOGY | • geochronology n. (Uncountable) The science of dating samples of rock or sediment. • geochronology n. (Countable) Any one of the methods by which the age of different samples of rock can be determined. • geochronology n. (Uncountable) The division of ancient time into named subdivisions / periods. |  | NEUROETHOLOGY | • neuroethology n. The study of animal behavior and its underlying control by the nervous system. • NEUROETHOLOGY n. the description of features of animal behaviour in terms of the mechanisms of the nervous system. |  | ORTHOGONALITY | • orthogonality n. (Mathematics, statistics, software engineering) The property of being orthogonal. • ORTHOGONALITY n. the state of being orthogonal. |  | ROENTGENOLOGY | • roentgenology n. (Medicine, archaic) Radiography. • ROENTGENOLOGY n. radiology, also RONTGENOLOGY. |  | SYNCHRONOLOGY | • synchronology n. Contemporaneous chronology. • synchronology n. Chronological arrangement side by side. • SYNCHRONOLOGY n. a chronological arrangement side by side. |  | UROGYNECOLOGY | • urogynecology n. A surgical subspecialty of urology and gynecology. |  
 Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America. Definitions are short excerpt from the WikWik.org and 1Word.ws. 
 See this list for:- English Wiktionary: 36 words
 - Scrabble in French: no word
 - Scrabble in Spanish: no word
 - Scrabble in Italian: no word
 - Scrabble in German: no word
 - Scrabble in Romanian: no word
 
 
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