opposite - see OPPONENT]...

ops - int. colloq. expressing surprise or apology, esp. on making an obvious mistake....

operational - adj. 1 a of or used for operations. b engaged or involved in operations. 2 able...

optimize - v. (also -ise) 1 tr. make the best or most effective...

opossum - n. 1 a any mainly tree-living marsupial of the...

optimum - n. & adj. (pl. optima or optimums) 1 a the most favourable conditions (for growth,...

oposite - see OPPONENT]...

opponent - n. & adj. a person who opposes or belongs to an opposing...

operation - begin operations). 4 an act of surgery performed on a patient. 5 a a

option - n. 1 a the act or an instance of choosing; a choice....

opration - begin operations). 4 an act of surgery performed on a patient. 5 a a

operaton - begin operations). 4 an act of surgery performed on a patient. 5 a a

oportunity - n. (pl. -ies) 1 a good chance; a favourable occasion. 2 a chance or opening offered...

opium - n. 1 a reddish-brown heavy-scented addictive ...

oppostion - n. 1 resistance , antagonism. 2 the state of...

optial - adj. 1 of sight; visual. 2 a of or concerning sight or light in relation to

opin - adj., v., & n. 1 not closed or locked or blocked up; allowing entrance or passage...

ophthalmology - n. the scientific study of the eye. ophthalmological adj. ophthalmologist n....