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There are 13 twelve-letter words containing OBIOL

ASTROBIOLOGY	• astrobiology n. (Sciences) The study of life anywhere in the universe, including the Earth. • ASTROBIOLOGY n. exobiology.
ETHNOBIOLOGY	• ethnobiology n. (Biology) The study of the relationships between plants and animals and human cultures. • ETHNOBIOLOGY n. the branch of biology involving the study of the traditional uses of plants and animals in various human societies.
EXOBIOLOGIES	• exobiologies n. Plural of exobiology. • EXOBIOLOGY n. the study of extraterrestrial life.
EXOBIOLOGIST	• exobiologist n. A biologist whose speciality is exobiology. • EXOBIOLOGIST n. a student of exobiology.
GNOTOBIOLOGY	• gnotobiology n. (Biology) The study of animals in a microbe-free environment. • GNOTOBIOLOGY n. the study of life in germfree conditions.
HYDROBIOLOGY	• hydrobiology n. (Biology) The study of the biology of the organisms that inhabit bodies of water. • HYDROBIOLOGY n. the study of aquatic organisms.
MICROBIOLOGY	• microbiology n. (Biology) The branch of biology that deals with microorganisms, especially their effects on man and… • MICROBIOLOGY n. the study of microscopic organisms.
NEUROBIOLOGY	• neurobiology n. (Biology) The scientific study of nerve and brain function in people and animals. • NEUROBIOLOGY n. the study of the anatomy of the nervous system.
PALEOBIOLOGY	• paleobiology n. The branch of biology or paleontology concerned with the study of fossils of plants and animals. • PALEOBIOLOGY n. a branch of paleontology concerned with the biology of fossil organisms, also PALAEBIOLOGY, PALAEOBIOLOGY.
PATHOBIOLOGY	• pathobiology n. (Biology) The branch of biology that deals with pathology with greater emphasis on the biological than… • pathobiology n. (Medicine) pathology (in any of its senses: study of disease, instance of disease, mechanism of disease). • pathobiology n. (Medicine) The biologic explanations of pathogenesis, to include both pathoanatomy and pathophysiology.
PHOTOBIOLOGY	• photobiology n. The study of the effects of light on living organisms, and on biological processes. • PHOTOBIOLOGY n. the study of the effects of light on organisms.
RADIOBIOLOGY	• radiobiology n. (Biology) The study of the effects of ionizing radiation on living organisms. • radiobiology n. (Biochemistry) The use of radioactive labels to study biological processes. • RADIOBIOLOGY n. a branch of biology dealing with the effects of radiation or radioactive materials on biological systems.
SOCIOBIOLOGY	• sociobiology n. The science that applies the principles of evolutionary biology to the study of social behaviour in… • SOCIOBIOLOGY n. the study of the biological basis of human behaviour.

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.

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English Wiktionary: 27 words
Scrabble in French: 8 words
Scrabble in Spanish: 6 words
Scrabble in Italian: 25 words
Scrabble in German: no word
Scrabble in Romanian: 36 words

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