Medical Dictionary


noun, often attrib \ˈtā(ə)l\

Medical Definition of TAIL

:  the rear end or a process or prolongation of the rear end of the body of an animal
:  one end of a molecule regarded as opposite to the head; especially :  the end of a lipid molecule that consists of a nonpolar hydrocarbon chain and is opposite to the polar group <most surface-active agents have a long hydrophobic tail attached to a polar head—R. E. Kirk & D. F. Othmer>
:  any of various parts of bodily structures that are terminal: as a :  the distal tendon of a muscle b :  the slender left end of the human pancreas c :  the common convoluted tube that forms the lower part of the epididymis
:  the motile part of a sperm that extends from the middle piece to the end and comprises the flagellum
:  a thin protein tube which forms part of the coat of some bacteriophages and through which DNA is injected into a cell
tailed \ˈtā(ə)ld\ adjective
tail·less \ˈtā(ə)l-les\ adjective

Illustration of TAIL


July 05, 2015
bunkum Hear it
insincere or foolish talk
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears