centra

noun centra

• heart — Anatomy. a hollow, pumplike organ of blood circulation, composed mainly of rhythmically contractile smooth muscle, located in the chest between the lungs and slightly to the left and consisting of four chambers: a right atrium that receives blood returning from the body via the superior and inferior vena cavae, a right ventricle that pumps the blood through the pulmonary artery to the lungs for oxygenation, a left atrium that receives the oxygenated blood via the pulmonary veins and passes it through the mitral valve, and a left ventricle that pumps the oxygenated blood, via the aorta, throughout the body.
• place — a particular portion of space, whether of definite or indefinite extent.
• hub — the central part of a wheel, as that part into which the spokes are inserted.
• kernel — the softer, usually edible part contained in the shell of a nut or the stone of a fruit.
• focus — a central point, as of attraction, attention, or activity: The need to prevent a nuclear war became the focus of all diplomatic efforts.