(organic chemistry) A cyclic hydrocarbon containing at least one double bond / (organic chemistry) 1,7,7-trimethyltricyclo[2.2.1.0^2,6]heptane also known as tricyclene

The ordinal number twentieth, derived from this letter of the English alphabet, called tee and written in the Latin script.

(Internet slang, nonstandard, eye dialect) What, both in its standard meaning as an interjection, but especially as a response to an outrageous or unexpected statement.

(transitive) To confuse and bewilder; to leave speechless.