n. Colourless inflammable hydrocarbon occurring in petrol. [from *octa-]
- number n. (also octane rating) figure indicating the antiknock properties of a fuel.
OCTAVE
n. - mus. A interval between (and including) two notes, one having twice or half the frequency of vibration of the other. B eight notes occupying this interval. C each of the two notes at the extremes of this interval.
- eight-line stanza. [latin octavus eighth]
OCTAVO
n. (pl. -s) 1 size of a book or page given by folding a sheet of standard size three times to form eight leaves.
- book or sheet of this size. [latin: related to *octave]
OCULAR
adj. Of, for, or by the eyes; visual. [latin oculus eye]
ODDITY
n. (pl. -ies) 1 strange person, thing, or occurrence.
- peculiar trait.
- strangeness.
ODDSON
—n. State when success is more likely than failure. —adj. (of a chance) better than even; likely.
ODIOUS
adj. Hateful, repulsive. odiously adv. Odiousness n. [related to *odium]
OEDEMA
n. (us edema) accumulation of excess fluid in body tissues, causing swelling. [greek oideo swell]
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