plural of terraformation

(aviation) A usually-unintentional crash of an aircraft in which the aircraft flies into the ground while under full control by its pilots or autopilot.

(phonetics) A form of downdrift in which the high or mid tones, but not the low tone, shift downward in pitch after certain other tones. The result is that a tone may be realized at a certain pitch over a short stretch of speech, shifts downward and then continues at its new level, then shifts downward again, until the end of the prosodic contour is reached, at which point the pitch resets.

plural of terracette

(geomorphology) A type of landform, a ridge on a hillside formed when saturated soil particles expand, then contract as they dry, causing them to move slowly downhill.

The social and cultural aspects of an operational environment, especially in a military context.

plural of human terrain

A spatial conception of the character or use of language or languages.

plural of linguistic terrain

plural of height above average terrain