(nautical) ore/oil ; designating that a ship can carry both ore and oil

Abbreviation of owned and operated.

A blood type that has no antigens. It lacks the A, B and Rh factors on the blood cells. It is the universal donor for blood and can give blood to any blood type, but can only receive O- blood.

(organic chemistry) ortho-

descendant of; used to form Irish patronymic surnames.

Added to verb stems to create a noun describing an error relating to the action described by the verb.

A colloquializing suffix, typically appended to names, abbreviations of long words, or substantive uses of adjectives.

(humorous) Converts certain words to faux Italian or Spanish. Can be used with Spanish el for expressions such as el stinko.

(stenoscript) (a) an initial letter ⟨o⟩

The name of the Latin-script letter O. / A zero (used in reading out numbers).