colorless watery fluid of blood and lymph containing no cells and in which erythrocytes and leukocytes and platelets are suspended
(physical chemistry) a fourth state of matter distinct from solid or liquid or gas and present in stars and fusion reactors; a gas becomes a plasma when it is heated until the atoms lose all their electrons, leaving a highly electrified collection of nuclei and free electrons; "particles in space exist in the form of a plasma"
a green slightly translucent variety of chalcedony used as a gemstone
any of a large group of nitrogenous organic compounds that are essential constituents of living cells; consist of polymers of amino acids; essential in the diet of animals for growth and for repair of tissues; can be obtained from meat and eggs and milk and legumes; "a diet high in protein"
the main tower within the walls of a medieval castle or fortress
maintain by writing regular records; "keep a diary"; "maintain a record"; "keep notes"
hold and prevent from leaving; "The student was kept after school"
retain possession of; "Can I keep my old stuffed animals?"; "She kept her maiden name after she married"
look after; be the keeper of; have charge of; "He keeps the shop when I am gone"
maintain for use and service; "I keep a car in the countryside"; "She keeps an apartment in Paris for her shopping trips"
have as a supply; "I always keep batteries in the freezer"; "keep food for a week in the pantry"; "She keeps a sixpack and a week's worth of supplies in the refrigerator"
store or keep customarily; "Where do you keep your gardening tools?"
supply with room and board; "He is keeping three women in the guest cottage"; "keep boarders"
raise; "She keeps a few chickens in the yard"; "he keeps bees"
keep in a certain state, position, or activity; e.g., "keep clean"; "hold in place"; "She always held herself as a lady"; "The students keep me on my toes"
maintain in safety from injury, harm, or danger; "May God keep you"
fail to spoil or rot; "These potatoes keep for a long time"
a hemoprotein composed of globin and heme that gives red blood cells their characteristic color; function primarily to transport oxygen from the lungs to the body tissues; "fish have simpler hemoglobin than mammals"
any of a large variety of proteins normally present in the body or produced in response to an antigen which it neutralizes, thus producing an immune response