twin pair

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• Twin Cities Zephyr — Morning Zephyr Afternoon Zephyr Denver Zephyr locomotive 9906A sitting next to a steam engine at Chicago Union Station in 1943. The early Twin Cities Zephyrs used the same design …   Wikipedia

• Twin study — Twin studies are one of a family of designs in behavior genetics which aid the study of individual differences by highlighting the role of environmental and genetic causes on behavior. Twins are invaluable for studying these important questions… …   Wikipedia

• Twin Lakes — may refer to:Communities*Twin Lakes, California *Twin Lakes, Adams County, Colorado *Twin Lakes, Lake County, Colorado *Twin Lakes, Florida, a neighborhood of Fort Lauderdale *Twin Lakes, Indiana *Twin Lakes, Ohio, an unicorporated community in… …   Wikipedia

• twin — [twin] adj. [ME < OE twinn & ON tvinnr, double, both < base of TWO] 1. a) consisting of or being two separate but similar or closely related things; forming a pair; double; paired [twin beds] b) being one of a pair of such things; being a… …   English World dictionary

• Twin Bridges — may mean: *A pair of parallel bridges, see twin bridges.Locations*Twin Bridges, Montana A town in Montana *Twin Bridges, Missouri The former name of Evergreen, Missouri, a town in Missouri *Twin Bridges, California A town in CaliforniaBridges*The …   Wikipedia

• Twin — Twin, a. [OE. twin double, AS. getwinne two and two, pl., twins; akin to D. tweeling a twin, G. zwilling, OHG. zwiniling, Icel. tvennr, tvinnr, two and two, twin, and to AS. twi two. See {Twice}, {Two}.] 1. Being one of two born at a birth; as, a …   The Collaborative International Dictionary of English

• Twin boat — Twin Twin, a. [OE. twin double, AS. getwinne two and two, pl., twins; akin to D. tweeling a twin, G. zwilling, OHG. zwiniling, Icel. tvennr, tvinnr, two and two, twin, and to AS. twi two. See {Twice}, {Two}.] 1. Being one of two born at a birth;… …   The Collaborative International Dictionary of English

• Twin crystal — Twin Twin, a. [OE. twin double, AS. getwinne two and two, pl., twins; akin to D. tweeling a twin, G. zwilling, OHG. zwiniling, Icel. tvennr, tvinnr, two and two, twin, and to AS. twi two. See {Twice}, {Two}.] 1. Being one of two born at a birth;… …   The Collaborative International Dictionary of English

• Twin flower — Twin Twin, a. [OE. twin double, AS. getwinne two and two, pl., twins; akin to D. tweeling a twin, G. zwilling, OHG. zwiniling, Icel. tvennr, tvinnr, two and two, twin, and to AS. twi two. See {Twice}, {Two}.] 1. Being one of two born at a birth;… …   The Collaborative International Dictionary of English

• Twin ship — Twin Twin, a. [OE. twin double, AS. getwinne two and two, pl., twins; akin to D. tweeling a twin, G. zwilling, OHG. zwiniling, Icel. tvennr, tvinnr, two and two, twin, and to AS. twi two. See {Twice}, {Two}.] 1. Being one of two born at a birth;… …   The Collaborative International Dictionary of English

• Twin-screw steamer — Twin Twin, a. [OE. twin double, AS. getwinne two and two, pl., twins; akin to D. tweeling a twin, G. zwilling, OHG. zwiniling, Icel. tvennr, tvinnr, two and two, twin, and to AS. twi two. See {Twice}, {Two}.] 1. Being one of two born at a birth;… …   The Collaborative International Dictionary of English