Hypercapnia is an unusually high concentration of carbon dioxide in the blood which may be accompanied by hypoxemia, in which the oxygen level in the blood is low. This condition occurs as a result of poor gas exchange at the lungs which makes it difficult for people to eliminate carbon dioxide from their bodies.
Quick Answer. A tire treadwear rating refers to the amount of time the treads on a tire should last in specific conditions. Tire manufacturers indicate treadwear rating on their tires using a set of numbers between 100 and 700. These numbers indicate how long tire treads will remain safe and perform at their highest capacity.
tread (noun) the part (as of a wheel or shoe) that makes contact with the ground. Synonyms: pace, stride. tread (verb) structural member consisting of the horizontal part of a stair or step. Synonyms: pace, stride. step, tread (verb) put down or press the foot, place the foot For fools rush in where angels fear to tread; step on the brake Synonyms: maltreat, step, tread, pace, abuse, trample, mistreat, ill-use, ill-treat. tread, trample (verb) tread or stomp heavily or roughly The soldiers trampled across the fields Synonyms: tramp down, tread, step, tread down, trample. tread (verb) crush as if by treading on tread grapes to make wine Synonyms: step, trample. tread (verb) brace (an archer's bow) by pressing the foot against the center. Synonyms: step, trample. tread (verb)