| MEG | type genus of the Megapodiidae |
|---|---|
| MEG | humpback whales |
| MEG | large whalebone whale with long flippers noted for arching or humping its back as it dives |
| MEG | visible to the naked eye (especially of rocks and anatomical features) |
| MEG | larger of the two types of spore produced in heterosporous plants |
| MEG | gigantic extinct terrestrial sloth-like mammal of the Pliocene and Pleistocene in America |
| MEG | a large extinct ground sloth |
| MEG | a large extinct ground sloth |
| MEG | a large extinct ground sloth |
| MEG | extinct ground sloths |
| MEG | type genus of the Megatheriidae |
| MEG | a measure of explosive power (of an atomic weapon) equal to that of one million tons of TNT |