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 There are 10 fifteen-letter words containing A, B, H, I, O, S, T and Y| BIOSTRATIGRAPHY | • biostratigraphy n. (Biology, geology) The study of the stratigraphic distribution of fossils. • BIOSTRATIGRAPHY n. the determination of age, etc., of sedimentary strata from fossils which they contain.
 |  | HOLOBLASTICALLY | • holoblastically adv. In a holoblastic manner. • HOLOBLASTIC adv. of an entire egg, separated into individual blastomeres.
 |  | HYPERCATABOLISM | • hypercatabolism n. An increased rate of catabolism. • HYPERCATABOLISM n. an abnormally high rate of catabolism.
 |  | HYPERMETABOLISM | • hypermetabolism n. (Biochemistry) The physiological state of increased metabolic activity, typically occurring after significant… • HYPERMETABOLISM n. the physiological state of increased rate of metabolic activity.
 |  | HYPNOTISABILITY | • hypnotisability n. Alternative spelling of hypnotizability. • HYPNOTISABILITY n. the quality of being hypnotisable, also HYPNOTIZABILITY.
 |  | LABYRINTHODONTS | • labyrinthodonts n. Plural of labyrinthodont. • LABYRINTHODONT n. an extinct amphibian, so called from a mazy pattern on a section of its teeth.
 |  | STREPHOSYMBOLIA | • strephosymbolia n. A tendency, associated with word blindness, to twist or invert certain similar letters (such as b and d) when reading. • STREPHOSYMBOLIA n. a visual disorder where letters are seen mirror imaged.
 |  | SYMMETROPHOBIAS | • SYMMETROPHOBIA n. fear of symmetry. |  | THERMOSTABILITY | • thermostability n. (Uncountable) The condition of being thermostable. • thermostability n. (Countable) The extent to which something is thermostable.
 • THERMOSTABILITY n. the state of being thermostable.
 |  | ZYGOBRANCHIATES | • ZYGOBRANCHIATE n. a type of gastropod having paired, symmetrically placed gills, also ZYGOBRANCH. | 
 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 1Word.ws and WikWik.org.
 
 See this list for:English Wiktionary: 70 wordsScrabble in French: 3 wordsScrabble in Spanish: no wordScrabble in Italian: no wordScrabble in German: no wordScrabble in Romanian: no word
 
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