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List of 12-letter words containing

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There are 17 twelve-letter words containing E, H, L, 3O and T

ACOLOUTHOSESACOLOUTHOS n. (historical) the head of the Varangian guard of the Byzantine emperors, also AKOLOUTHOS, AKOLUTHOS.
AKOLOUTHOSESAKOLOUTHOS n. (historical) the head of the Varangian guard of the Byzantine emperors, also ACOLOUTHOS, AKOLUTHOS.
CHOREOLOGISTchoreologist n. One who studies choreology.
CHOREOLOGIST n. a student of choreology.
ECHOLOCATIONecholocation n. The use of echoes to detect objects as observed in bats and other natural creatures. Also known as biosonar.
ECHOLOCATION n. determining the position of objects by means of supersonic vibrations echoed from them, as a bat does.
ETHNOBIOLOGYethnobiology 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.
HEORTOLOGIESHEORTOLOGY n. the study of religious feasts.
HEORTOLOGISTheortologist n. A person who studies heortology.
HEORTOLOGIST n. one who practises heortology, the study of religious feasts.
HETEROLOGOUSheterologous adj. Having different relationships or different elements.
heterologous adj. (Biology) Of, or relating to different species.
HETEROLOGOUS adj. differing; comprising different parts or parts in different proportions.
LOPHOPHORATElophophorate adj. (Zoology) Having a lophophore.
lophophorate n. (Zoology) A member of the Lophophorata, a clade of invertebrate animals.
LOPHOPHORATE adj. of or like a lophophore, a ring of ciliated tentacles round the mouth of some sedentary marine animals.
PHOTOBLOGGEDPHOTOBLOG v. to keep a photoblog.
PHOTOGEOLOGYphotogeology n. The use of aerial photography to interpret geologic features.
PHOTOGEOLOGY n. a branch of geology concerned with the identification and study of geological features through the study of aerial or orbital photographs.
PHOTOPOLYMERphotopolymer n. (Chemistry) Any polymer that reacts to light with a physical or chemical change, used especially for teeth fillings.
PHOTOPOLYMER n. a photosensitive plastic used esp. in the manufacture of printing plates.
PROTOPHLOEMSprotophloems n. Plural of protophloem.
PROTOPHLOEM n. the first-formed phloem that develops from procambium, usually associated with a region of rapid growth.
STOECHIOLOGYstoechiology n. Alternative form of stoichiology.
stœchiology n. Scientific study of bodily elements.
stœchiology n. Treatise of physiological elements.
TODDLERHOODStoddlerhoods n. Plural of toddlerhood.
TODDLERHOOD n. the state of being a toddler.
TROPHOLOGIESTROPHOLOGY n. the study of nutrition.
TROUBLESHOOTtroubleshoot v. (Transitive, intransitive) To analyze or diagnose (a problem, or something faulty) to the point of determining…
TROUBLESHOOT v. to solve problems.

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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