diameter diameter  /daɪ ˈæ mə tər/


  1. (n) the length of a straight line passing through the center of a circle and connecting two points on the circumference
  2. (n) a straight line connecting the center of a circle with two points on its perimeter (or the center of a sphere with two points on its surface)

Derived Word(s)


  1. It turns out to be a spherical particle almost exactly a millionth of an inch in diameter.
  2. It it's ice, like a comet, and smaller than 200 feet in diameter, it would totally burn up in the atmosphere.
  3. So did this: detonated in lower Manhattan, a 10-kiloton bomb would kill some 100,000 civilians and irradiate 700,000 more, flattening everything in a half-mile diameter.


  1. Two-inch hail reported in Spearfish during Saturday storm

    Hail as large as two inches in diameter pelted parts of Spearfish on Saturday night, according to the National Weather Service.
    on June 24, 2013     Source: Rapid City Journal

  2. FAST Corp. continues to draw attention with fiberglass creations

    SPARTA — The 30-foot-diameter eyeball in front of FAST Corp. soon will be hauled to Texas and go on display in downtown Dallas for at least two years.
    on June 23, 2013     Source: La Crosse Tribune

  3. Israeli Smart Spice

    June 22, 2013: Israel has introduced a competitor for the American SDB (Small Diameter Bomb). The Israeli Spice 250 is a 113 kg (249 pound) bomb that, like the SDB, looks like a missile and has pop-out wings.
    on June 22, 2013     Source: Strategy Page


  1. "No one is going to get up and make high-profile announcement about the diameter of the stack running into the sewer system," Naylor told reporters. "But you get that wrong and you've got a rather large problem."
    on Jan 29, 2008 By: David Naylor Source: Toronto Star

  2. "If we had to choose today, where we would go is that circular depression," said Steven Squyres,a Cornell University geologist in charge of the robot's instruments. "This particular one is roughly 30 feet in diameter. It's something like 40...
    on Jan 5, 2004 By: Steve Squyres Source: CNN International

  3. "A weapon has to be able to differentiate between a military target and a civilian object," said Marc Garlasco, HRW investigator. "By using white phosphorous, which covers an area of 250 metres in diameter, it cannot then differentiate where...
    on Mar 25, 2009 By: Marc Garlasco Source: Canada.com

Word of the Day
decadent decadent
/ˈdɛ kə dənt /