lower coating
41integument — /in teg yeuh meuhnt/, n. 1. a natural covering, as a skin, shell, or rind. 2. any covering, coating, enclosure, etc. [1605 15; < L integumentum a covering. See IN 2, TEGUMENT] Syn. 1. cortex, involucre, involucrum. * * * Covering of the body,… …
42radiation — radiational, adj. /ray dee ay sheuhn/, n. 1. Physics. a. the process in which energy is emitted as particles or waves. b. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and… …
43Gold — This article is about the metal. For the color, see Gold (color). For other uses, see Gold (disambiguation). platinum ← gold → mercury …
44Parkerizing — (also called phosphating and phosphatizing) is a method of protecting a steel surface from corrosion and increasing its resistance to wear through the application of an electrochemical phosphate conversion coating. Parkerizing is usually… …
45Geology of Mars — Mars   Mars as seen by the Hubble Space Telescope Designations …
46Vacuum tube — This article is about the electronic device. For experiments in an evacuated pipe, see free fall. For the transport system, see pneumatic tube. Modern vacuum tubes, mostly miniature style In electronics, a vacuum tube, electron tube (in North… …
47Neon sign — …
48Zinc oxide — Other names Zinc white Calamine Identifiers …
49Bisphenol A — Bisphenol A IUPAC name …
50Hindenburg disaster — Infobox Aircraft accident name = LZ 129 Hindenburg caption = Hindenburg a few seconds after catching fire. date = May 6, 1937 type = Airship fire site = Lakehurst Naval Air Station in Manchester Township, New Jersey coords =… …
