(biology) any agency bringing about activation; a molecule that increases the activity of an enzyme or a protein that increases the production of a gene product in DNA transcription
a position on a basketball team of the player who participates in the jump that starts the game
the position of the player on the line of scrimmage who puts the ball in play; "it is a center's responsibility to get the football to the quarterback"
the position on a hockey team of the player who participates in the face off at the beginning of the game
a building dedicated to a particular activity; "they were raising money to build a new center for research"
a cluster of nerve cells governing a specific bodily process; "in most people the speech center is in the left hemisphere"
the object upon which interest and attention focuses; "his stories made him the center of the party"
the sweet central portion of a piece of candy that is enclosed in chocolate or some other covering
politically moderate persons; centrists
the middle of a military or naval formation; "they had to reinforce the center"
a place where some particular activity is concentrated; "they received messages from several centers"
a point equidistant from the ends of a line or the extremities of a figure
an area that is approximately central within some larger region; "it is in the center of town"; "they ran forward into the heart of the struggle"; "they were in the eye of the storm"
(football) the person who plays center on the line of scrimmage and snaps the ball to the quarterback; "the center fumbled the handoff"
(basketball) the person who plays center on a basketball team
(ice hockey) the person who plays center on a hockey team
of or belonging to neither the right nor the left politically or intellectually
move into the center; "That vase in the picture is not centered"
living things collectively; "the oceans are teeming with life"
the experience of being alive; the course of human events and activities; "he could no longer cope with the complexities of life"
a motive for living; "pottery was his life"
a living person; "his heroism saved a life"
the organic phenomenon that distinguishes living organisms from nonliving ones; "there is no life on the moon"
the course of existence of an individual; the actions and events that occur in living; "he hoped for a new life in Australia"; "he wanted to live his own life without interference from others"
a characteristic state or mode of living; "social life"; "city life"; "real life"
the period during which something is functional (as between birth and death); "the battery had a short life"; "he lived a long and happy life"
the period between birth and the present time; "I have known him all his life"
the period from the present until death; "he appointed himself emperor for life"