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All Words Glossary

Glossary of Affixes Terms
beginning with letter O
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ob-
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prefix
  1. Against; facing; a combining prefix used with verbs of Latin origin.
  2. (botany) Of a reversed shape.
oct-
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prefix
  1. Form of octa- or octo- used before a vowel.
octa-
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prefix or before a vowel oct-
  1. eight
octo-
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prefix or before a vowel oct-
  1. eight
Of-
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prefix
  1. a regulatory body for a specified industry
oligo-
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prefix
  1. few
omni-
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prefix
  1. a combining form meaning "all", used in the formation of compound words.
oo-
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prefix
  1. Combining prefix indicating egg, ovum.
opto-
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prefix
  1. eye, vision, light
ortho-
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prefix
  1. straight, right, proper
  2. (chemistry) Having an extra proportion of water
  3. (chemistry) in isomeric benzene derivatives, having the two substituents in adjacent positions (compare meta- and para-)
  4. (physics) of any molecule of the form X2 in which the two nuclei have parallel spin
osteo-
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prefix
  1. bone
out-
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prefix (infl, en, prefix, cat=prefixes)
  1. External to
    outback
    outhouse
  2. Surpassing, exceeding
    outdo
    outlast
  3. Greater than, beyond
    outsize
over-
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prefix
  1. above, or higher
  2. superior
  3. excessively
oxy-
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prefix
  1. Concerning oxygen
  2. Sharp, keen, acute, pungent, acid
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