perforation pattern

См. также в других словарях:

• perforation — noun Date: 15th century 1. the act or process of perforating 2. a. a hole or pattern made by or as if by piercing or boring b. one of the series of holes (as between rows of postage stamps) in a sheet that serve as an aid in separation …   New Collegiate Dictionary

• spongework cave pattern —    A complex maze cave pattern consisting of irregular interconnecting cavities with intricate perforation of the rock. The cavities may be large or small. All spongework patterns are non branching in development and contain profuse travertine.… …   Lexicon of Cave and Karst Terminology

• angiosperm — /an jee euh sperrm /, n. Bot. a plant having its seeds enclosed in an ovary; a flowering plant. Cf. gymnosperm. [ANGIO + SPERM] * * * ▪ plant Introduction       any member of the more than 300,000 species of flowering plants (division Anthophyta) …   Universalium

• printing — /prin ting/, n. 1. the art, process, or business of producing books, newspapers, etc., by impression from movable types, plates, etc. 2. the act of a person or thing that prints. 3. words, symbols, etc., in printed form. 4. printed material. 5.… …   Universalium

• Postage stamp separation — For postage stamps, separation is the means by which individual stamps are made easily detachable from each other. Methods of separation include: # perforation cutting rows and columns of small holes # rouletting small horizontal and vertical… …   Wikipedia

• Magnoliidae — ▪ plant subclass Introduction       subclass of woody or herbaceous flowering plants belonging to the class Magnoliopsida.       Members of the Magnoliidae are dicotyledonous plants that retain some primitive anatomic and morphological… …   Universalium

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