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os·mi·um noun : a heavy hard brittle metallic chemical element used esp. as a catalyst and in alloys

os·mo·sis noun : movement of a solvent through a semipermeable membrane into a solution of higher concentration that tends to equalize the concentrations of the solutions on either side of the membrane

— os·mot·ic adjective

os·prey noun, plural ospreys : a large dark brown and white fish-eating hawk

os·si·fy verb -fied; -fy·ing : to make or become hardened or set in one's ways

— os·si·fi·ca·tion noun

os·su·ary noun, plural -ar·ies : a depository for the bones of the dead

os·ten·si·ble adjective : shown outwardly : APPARENT

Synonyms

apparent, assumed, evident, reputed, seeming, supposed—more at APPARENT

os·ten·si·bly adverb 1 : in an ostensible manner

2 : to all outward appearances

Synonyms

apparently, evidently, presumably, seemingly, supposedly—more at APPARENTLY

os·ten·ta·tion noun : pretentious or excessive display

— os·ten·ta·tious·ly adverb

Synonyms

flamboyance, flashiness, gaudiness, glitz, pretentiousness, showiness, swank; also extravaganza, pageant, parade, show; dazzle, pageantry, spectacle; adornment, decoration, dressing, embellishment, garnishment, ornamentation, trimming; extravagance, opulence, richness; loudness; meretriciousness, vulgarity

Antonyms

austerity, plainness, severity

os·ten·ta·tious adjective : marked by or fond of conspicuous or sometimes pretentious display

Synonyms

flamboyant, flashy, garish, gaudy, glitzy, loud, swank, tawdry—more at GAUDY

affected, grandiose, highfalutin, pompous, pretentious—more at PRETENTIOUS

os·teo·path noun : a practitioner of osteopathy

os·te·op·a·thy noun : a system of treating diseases emphasizing manipulation (as of joints) but not excluding other agencies (as the use of medicine and surgery)

— os·teo·path·ic adjective

os·teo·po·ro·sis noun, plural -ro·ses : a condition affecting esp. older women and characterized by fragile and porous bones

os·tra·cise British variant of OSTRACIZE

os·tra·cize verb -cized; -ciz·ing [ORIGIN: Gk ostrakizein to banish by voting with potsherds, fr. ostrakon shell, potsherd]

: to exclude from a group by common consent

— os·tra·cism noun

os·trich noun : a very large swift-footed flightless bird of Africa and Arabia

Os·we·go tea noun : a No. American mint with showy scarlet flowers

OT abbreviation 1 occupational therapy

2 Old Testament

3 overtime

1other adjective 1 : being the one left; also : being the ones distinct from those first mentioned

2 : ALTERNATE

3 : not the same : DIFFERENT

4 : existing by way of addition : ADDITIONAL

5 : recently past

Synonyms

[3] different, disparate, dissimilar, distinct, distinctive, distinguishable, diverse, unalike, unlike—more at DIFFERENT

[4] additional, another, else, farther, further, more—more at ADDITIONAL

2other pronoun 1 : remaining one or ones

2 : a different or additional one

oth·er·wise adverb 1 : in a different way

2 : in different circumstances

3 : in other respects

4 : if not

5 : NOT

— otherwise adjective

Synonyms

differently, else, other; also diversely, variously

Antonyms

likewise

oth·er·world noun : a world beyond death or beyond present reality

oth·er·world·ly adjective : not worldly : concerned with spiritual, intellectual, or imaginative matters

oti·ose adjective 1 : FUTILE

2 : IDLE

3 : USELESS

oto·lar·yn·gol·o·gy noun : a medical specialty concerned esp. with the ear, nose, and throat

— oto·lar·yn·gol·o·gist noun

oto·rhi·no·lar·yn·gol·o·gy noun : OTOLARYNGOLOGY

— oto·rhi·no·lar·yn·gol·o·gist noun

OTS abbreviation officers' training school

Ot·ta·wa noun, plural Ottawas or Ottawa : a member of an American Indian people of Michigan and southern Ontario

ot·ter noun, plural otters also otter : any of various web-footed fish-eating mammals with dark brown fur that are related to the weasels; also : the fur