(geology) Of a geologic era within the Archaean eon from about 3200 to 2800 million years ago; stromatolites have existed from this time.

(Internet slang) oh, right; acknowledgment of understanding / Pronunciation spelling of alright.

A surname.

A fungus that affects corn (maize), taxonomic name Ustilago maydis, which induces tumors in the plant, known to be eaten as a delicacy.