Noun
Any of various red-coloured ants. [from 8th c.]
An ant of the genus Myrmica, especially the European red ant or common red ant (Myrmica rubra).
(US) The pharaoh ant (Monomorium pharaonis).
(Australia) The meat ant (Iridomyrmex purpureus), endemic to Australia.
The red harvester ant (Pogonomyrmex barbatus), native to southwestern US.
The red imported fire ant (Solenopsis invicta), native to South America, but broadly invasive.
The European red wood ant (Formica polyctena or Formica pratensis).
The red bull ant (Myrmecia gulosa).
Source: en.wiktionary.org