two by two
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Two and a Half Men — Genre Sitcom Created by Chuck Lorre Lee Aronsohn … Wikipedia
Two-factor authentication — (TFA, T FA or 2FA) is an approach to authentication which requires the presentation of two different kinds of evidence that someone is who they say they are. It is a part of the broader family of multi factor authentication, which is a defense in … Wikipedia
Two — (t[=oo]), a. [OE. two, twa, properly fem. & neut., twei, twein, tweien, properly masc. (whence E. twain), AS. tw[=a], fem. & neut., tw[=e]gen, masc., t[=u], neut.; akin to OFries. tw[=e]ne, masc., tw[=a], fem. & neut., OS. tw[=e]ne, masc., tw[=a] … The Collaborative International Dictionary of English
Two-photon excitation microscopy — is a fluorescence imaging technique that allows imaging of living tissue up to a very high depth, that is up to about one millimeter. Being a special variant of the multiphoton fluorescence microscope, it uses red shifted excitation light which… … Wikipedia
Two-body problem — Two bodies with similar mass orbiting around a common barycenter with elliptic orbits. In classical mechanics, the two body problem is to determine the motion of two point particles that interact only with each other. Common examples include a… … Wikipedia
Two-Gun Kid — (Matt Hawk / Matt Liebowicz) Art by Scott Kolins. Publication information Publisher Marvel Comics … Wikipedia
Two-toed sloth — Two toed sloths[1] Temporal range: 35–0 Ma … Wikipedia
Two-photon absorption — (TPA) is the simultaneous absorption of two photons of identical or different frequencies in order to excite a molecule from one state (usually the ground state) to a higher energy electronic state. The energy difference between the involved… … Wikipedia
Two-phase electric power — Two phase electrical power was an early 20th century polyphase alternating current electric power distribution system. Two circuits were used, with voltage phases differing by 90 degrees. Usually circuits used four wires, two for each phase. Less … Wikipedia
Two-Edge — is one of the main antagonists in the comic book series Elfquest . Two Edge is an at least half mad, but ingenious inventor and schemer. This character was created by Wendy and Richard Pini. Twisted by his mother and pining over the loss of his… … Wikipedia
Two-up — is a traditional Australian gambling game, involving a designated Spinner throwing two coins into the air. Players gamble on whether the coins will fall with both heads up, both tails up, or with one coin a head, and one a tail (known as Odds ).… … Wikipedia
