Main Entry: hor·i·zon·tal

Pronunciation: \ˌhȯr-ə-ˈzänt-^əl, ˌhär-\

Function: adjective

1 : relating to or being a transverse plane or section of the body
2 : relating to or being transmission (as of a disease) by physical contact or proximity in contrast with inheritance—compare vertical

—hor·i·zon·tal·ly \-^əl-ē\ adverb