- terrierA dog from a group of small, lively breeds, originally bred for the hunting of burrowing prey such as rats, rabbits, foxes, and even otters; this original function is reflected in some of their names (e.g. rat terrier).
- terraEarth, soil, land, or ground as a physical surface.
- terrariumAn enclosure wherein small animals are displayed, usually with some plants, in a naturalistic setting.
- terraceousResembling earth (soil, dirt).
- terraculturecultivation of the earth; agriculture
- terraqueousChiefly in terraqueous globe (that is, the Earth): consisting of both land and water.
- terrellaA small magnetized model ball representing the Earth, used in investigating magnetism.