1. (colloquial) am not, has not, have not, is not, are not

Encyclopedia: Ain't

• genus Rhizopus
• genus Rhodanthe
• genus Rhododendron
• genus Rhodosphaera
• genus Rhodymenia
• genus Rhus
• genus Rhyacotriton
• genus Rhynchoelaps
• genus Rhyncostylis
• genus Rhynia
• genus Ribes
• genus Richea
• genus Richmondena
• genus Ricinus
• genus Rickettsia
• genus Riparia
• genus Rissa
• genus Rivina
• genus Rivulus
• genus Robinia
• genus Roccella
• genus Roccus
• genus Rodolia
• genus Romneya
• genus Roridula