-O- is a horizontally symmetrical term. More symmetrical terms!
-O- is a term made from vertically symmetrical letters.
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Definition of -O-
What does -O- mean?
- [pharmacology] a monoclonal antibody derived from a murine source
- A linking vowel inserted interconsonantally between two morphemes, to ease pronunciation, without contributing to the meaning. It is frequently joins words of Ancient Greek origin but can also be used between modern terms and even abbreviations.