Puzzles & Games
Word of the Day
Apps by Dictionary
What word or phrase does your mother always say?
one of a pair of twins who develop from a single fertilized ovum and therefore have the same genotype, are of the same sex, and usually resemble each other closely.
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Examples from the web for
For example, compare
correlations on a trait with fraternal twin correlations.
Their findings: an
's behavior could help predict that of his or her sibling, but not so with fraternal pairs.
For example, when one genetically
is autistic, the other is usually not autistic.
Relativity dictates that when he comes back, he is younger than his
So the first one is
studies done with humans that were separated at birth.
females of average intelligence and energy level ethic raised in the same household.
Unless you've got an
, we're all genetically different.
had virus populations that didn't resemble those of their sibling-or anybody else, for that matter.
The only cure is a transplant of blood stem cells from a close relative or preferably an
sisters are brought up separately, differently.
Discover our greatest slideshows
Sweet Chucks: 10 Excellent...
C'mon, Get Happy: 7 Happy...
Dough, Clams, and Greenbacks:...
7 Ways to Say Thank You
Browse more topics on our blog
What Is the Difference Between Discreet and Discrete?
Learn the correct uses of these two commonly confused homophones.
What Character Was Removed from the Alphabet?
What mistaken pronunciation gave this character its name?
This small mark has two primary uses: to signify possession or omitted letters.
How Do I Get a Word into the Dictionary?
People invent new words all the time, but which ones actually make it?
Word of the Day
Difficulty index for
Few English speakers likely know this word
Word Value for
Words With Friends
Nearby words for identical twin
idealized instruction set
ideas of reference