ogive

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A distribution curve in which the frequencies are cumulative.
• noun A frequency distribution.
• noun A diagonal rib of a Gothic vault.
• noun A pointed arch.

from The Century Dictionary.

• Ogival.
• noun In architecture: A pointed arch; also, the diagonal rib of a vault of the type normal in the French architecture of the thirteenth century. See arc ogive, under arc.
• noun A window of the Pointed style.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Arch.) The arch or rib which crosses a Gothic vault diagonally.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun statistics The curve of a cumulative distribution function.
• noun architecture A Gothic pointed arch, or a rib of a Gothic vault.
• noun ballistics The pointed, curved nose of a bullet, missile, or rocket.
• noun geology A three-dimensional wave-bulge, characteristic of glaciers that have experienced extreme underlying topographic change.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun front consisting of the conical head of a missile or rocket that protects the payload from heat during its passage through the atmosphere