(slang) The element of a situation or problem that should be obvious but may go unnoticed through human error.

A method of long duration deep diving, which involves saturating body tissues with inert gas (helium), and bringing body tissues into equilibrium with the breathing mix (heliox).

An unincorporated community in Mercer County, Illinois, United States. / A town in Elkhart County, Indiana, United States. / unincorporated communities in Hamilton, Orange and Warrick Counties, Ind...

present participle of payroll