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List of 12-letter words containing

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There are 19 twelve-letter words containing I, M, O, 2P and U

AMPHITROPOUSamphitropous adj. (Botany) Having the ovule bent so that the ends are near each other.
AMPHITROPOUS adj. of an ovule, with its point of attachment in the middle.
APPRESSORIUMappressorium n. (Mycology) A bulbous formation produced by parasitic fungi that is well attached to the cuticle of the…
APPRESSORIUM n. the flattened thickened tip of a hyphal branch by which some parasitic fungi attach to and penetrate their host.
HIPPOPOTAMUShippopotamus n. A large, semi-aquatic, herbivorous (plant-eating) African mammal (Hippopotamus amphibius; common hippopotamus).
hippopotamus n. Any similar animal of the family Hippopotamidae.
Hippopotamus prop.n. A taxonomic genus within the family Hippopotamidae – hippopotamuses.
IPRATROPIUMSIPRATROPIUM n. a bronchodilator drug used in the treatment of asthma.
MESOHIPPUSESMESOHIPPUS n. an extinct mammal of the Horse family.
MUCOPEPTIDESmucopeptides n. Plural of mucopeptide.
MUCOPEPTIDE n. another name for peptidoglycan.
MULTIPURPOSEmultipurpose adj. Designed or intended to fit more than one type of function or application; having multiple uses.
multi-purpose adj. Alternative form of multipurpose.
MULTIPURPOSE adj. having many purposes.
OPPORTUNISMSopportunisms n. Plural of opportunism.
OPPORTUNISM n. the practice of regulating actions by favourable opportunities rather than consistent principles.
PERIMORPHOUSperimorphous adj. Perimorphic.
PERIMORPHOUS adj. like a perimorph, also PERIMORPHIC.
PHOSPHONIUMSphosphoniums n. Plural of phosphonium.
PHOSPHONIUM n. the radical PH4, analogous to ammonium.
PITTOSPORUMSpittosporums n. Plural of pittosporum.
PITTOSPORUM n. any of numerous chiefly subtropical evergreen shrubs or small trees.
PITYROSPORUMPityrosporum prop.n. Former name of Malassezia (“fungus genus”).
PITYROSPORUM n. a yeastlike fungus which can cause pityriasis.
PRECOMPUTINGprecomputing v. Present participle of precompute.
PRECOMPUTE v. to compute in advance.
PRESUMPTIONSpresumptions n. Plural of presumption.
PRESUMPTION n. the act of presuming.
PROMPTITUDESpromptitudes n. Plural of promptitude.
PROMPTITUDE n. the quality or habit of being prompt.
PROMPTUARIESpromptuaries n. Plural of promptuary.
PROMPTUARY n. a repository; a reference book of facts.
PSEUDOPODIUMpseudopodium n. (Cytology) pseudopod.
PSEUDOPODIUM n. a process protruding from the cell of a protozoan, etc., used for movement or feeding.
SUPERIMPOSEDsuperimposed v. Simple past tense and past participle of superimpose.
superimposed adj. Positioned on or above something else, especially in layers; superposed.
superimposed adj. (Geology) layered or stratified.
SUPERIMPOSESsuperimposes v. Third-person singular simple present indicative form of superimpose.
SUPERIMPOSE v. to place or lay over or above something.

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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