rod lattice
41Eastern span replacement of the San Francisco — San Francisco – Oakland Bay Bridge (eastern span replacement) Artistic rendition of the new eastern span of the Bay Bridge seen from Treasure Island (ca. 2014) Official name To be determ …
42Nonlinear photonic crystal — Nonlinear photonic crystals are usually used as quasi phase matching materials. They can be either one dimensional[1] or two dimensional.[2] Nonlinear Photonic Crystals Broadly speaking, nonlinear photonic crystals (PC) are periodic structures… …
43Nuclear poison — A nuclear poison, also called a neutron poison is a substance with a large neutron absorption cross section in applications, such as nuclear reactors, when absorbing neutrons is an undesirable effect. However neutron absorbing materials, also… …
44Vienna General Hospital — The Vienna General Hospital ( de. Allgemeines Krankenhaus der Stadt Wien) (AKH) is the University clinic of the city of Vienna, Austria. The AKH is the largest hospital of Austria, and at 85 m (279 ft) high is one of the tallest hospital… …
45integrated circuit — Electronics. a circuit of transistors, resistors, and capacitors constructed on a single semiconductor wafer or chip, in which the components are interconnected to perform a given function. Abbr.: IC Also called microcircuit. [1955 60] * * * ▪… …
46United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …
47virus — viruslike, adj. /vuy reuhs/, n., pl. viruses. 1. an ultramicroscopic (20 to 300 nm in diameter), metabolically inert, infectious agent that replicates only within the cells of living hosts, mainly bacteria, plants, and animals: composed of an RNA …
48Caesium — xenon ← caesium → barium Rb ↑ Cs ↓ Fr …
49Door — For other uses, see Door (disambiguation). A door is a movable structure used to open and close off an entrance, typically consisting of a panel that swings on hinges or that slides or rotates inside of a space. When open, they admit ventilation… …
50Gold — This article is about the metal. For the color, see Gold (color). For other uses, see Gold (disambiguation). platinum ← gold → mercury …
