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-onium

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Read Also:

• -onym

  a combining form of greek origin, meaning “word,” “name”: pseudonym. -onym combining form indicating a name or word acronym, pseudonym word origin from greek -onumon, from onuma, doric variant of onoma name

• -oon

  a suffix occurring in words borrowed from french and other romance languages (b-ssoon; balloon; dragoon; pontoon), and on this model occasionally used in the formation of new nouns in english (spittoon).

• -opia

  a combining form occurring in compound words denoting a condition of sight or of the visual organs: diplopia; hemeralopia; myopia. also, -opsia. -opia combining form indicating a visual defect or condition myopia derived forms -opic, combining_form:in_adjective word origin from greek, from ōps eye -opia suff. a visual condition or defect of a specified kind: anisometropia.

• -opsia

  variant of -opia: hemianopsia. also, -opsy2 .

• -opsis

  a combining form meaning “likeness,” used especially in the names of living organisms and organic structures that resemble the thing named by the initial element: coreopsis. -opsis combining form indicating a specified appearance or resemblance meconopsis word origin from greek opsis sight

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