pressure cooker

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

• noun An airtight metal pot that uses steam under pressure at high temperature to cook food quickly.
• noun Informal A situation or an atmosphere of difficulty, stress, or anxiety.

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

• (Cookery) a pot with a lid which may be tightly bound to the bottom part, forming a vessel which can withstand some gas pressure from within. It is used to heat foods in water or steam to a temperature somewhat above the boiling point of water, allowing the cooking process to be accomplished more quickly than otherwise.
• Fig., a situation involving intense psychological pressure due to multiple urgent demands, as in certain job situations.

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

• noun cooking A sealed cooking vessel that allows cooking in greater than atmospheric pressure and at a temperature above the boiling point of water.

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

• noun autoclave for cooking at temperatures above the boiling point of water