What is the symbol for Long O?

There isn't a single "symbol" for the long O sound in English. The way it's represented depends on the spelling:

Common spellings and their pronunciations:

* o: open, old, one (as in "go")

* oa: oat, oak (as in "goat")

* ow: owl, own (as in "cow")

* oe: oester, oed (as in "toe")

* au: aught, author (as in "caught")

Phonetic symbol:

The phonetic symbol for the long O sound is [oʊ].

Important note: In English, the pronunciation of words can vary depending on the dialect. So, while these are common spellings and pronunciations, there may be exceptions or regional variations.