What is O?
{{distinguish|0}} {{A-Z}} [[File:O cursiva.gif|thumb]] '''O''' is the fifteenth ([[15 (number)|number 15]]) letter in the [[English language|English]] [[alphabet]] and it has a shape of a circle. == Meanings for O == * On [[calendar]]s, O sometimes means the [[month]] [[October]]. * In [[chemistry]], O is the symbol for [[oxygen]]. * In [[medicine]], O is one of the human [[blood type]]s. * Sometimes when saying decimals, O is another word for zero. ==Other websites== {{wikt-inline}}<br /> {{commonscat-inline}} {{Latin script}} {{stub}} [[Category:Vowel letters]]