- a combining form used in the names of units of measure equal to one trillion of a given base unit: terahertz.
- Computers. a combining form of like function with the value 240 (=1,099,511,627,766). Abbreviation: T
Origin of tera-
< Greek téras monster. See terato-
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- denoting 10 12terameter
- Also: tebi- denoting 2 40terabyte
from Greek teras monster
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for tera-
prefix used in forming large units of measure (e.g. terabyte), 1947, from Greek teras (genitive teratos) "marvel, monster."
Online Etymology Dictionary, © 2010 Douglas Harper
- One trillion (1012):terahertz.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- A prefix that means:
- One trillion (1012), as in terahertz, one trillion hertz.
- 240 (that is, 1,099,511,627,776), which is the power of two closest to a trillion, as in terabyte.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.