A twin is one of two offspring produced in the same pregnancy. Twins can either be monozygotic ("identical"), meaning that they develop from one zygote that splits and forms two embryos, or dizygotic ("fraternal") this is because they develop from two separate eggs that are fertilized by two separate sperm.
In contrast, a fetus which develops alone in the womb is called a singleton, and the general term for one offspring of a multiple birth is multiple.
Other articles related to "twin, twins":
... NavSource Photos of Twin Falls MARAD PMARS Data for Twin Falls Victory 1945-1960 MARAD PMARS Data for Twin Falls 1970-1982 ...
1959 – April 29, 2008), aka "El Mellizo (the twin)" or "Pablo Arauca", was a Colombian drug lord and former paramilitary leader along twin brother Miguel Ángel of ... Mejia-Munera along with twin brother Miguel Ángel were wanted by the United States and Colombian governments on charges related to the Illegal drug trade in Colombia and forming ...
... Twin Dragons is a 1992 Hong Kong action-comedy film directed by Ringo Lam and Tsui Hark, starring Jackie Chan in two roles as a pair of twin brothers ...
... Adam M-309 CarbonAero - (2000) Twin-piston engine centerline thrust technology demonstrator aircraft built for Adam Aircraft by Scaled Composites Adam A500 - (2002) Twin-piston engine centerline thrust ... Development of M-309 Adam A700 AdamJet - (2003) Twin-turbofan engine six-person (+1 in optional belted lav) aircraft, with configuration similar to A500 ...
... Twins are common in many animal species, such as cats, sheep, ferrets, giant pandas, dogs and deer ... A female calf that is the twin of a bull becomes partially masculinized and is known as a freemartin ... The nine-banded armadillo (Dasypus novemcinctus) has identical twins (usually four babies) as its regular reproduction and not as exceptional cases ...
Famous quotes containing the word twin:
“That Dali is really Norman Rockwells twin brother kidnapped by gypsies in babyhood.”
—Vladimir Nabokov (18991977)
“We live under continual threat of two equally fearful, but seemingly opposed, destinies: unremitting banality and inconceivable terror. It is fantasy, served out in large rations by the popular arts, which allows most people to cope with these twin specters.”
—Susan Sontag (b. 1933)
“If they be two, they are two so
As stiff twin compasses are two;
Thy soul, the fixed foot, makes no show
To move, but doth if th other do.”
—John Donne (15721631)