Pulmonary embolism. Pulmonary embolism Pulmonary embolism occurs when a blood clot gets lodged in an artery in the lung, blocking blood flow to part of the lung. Blood clots most often originate in the legs and travel up through the right side of the heart and into the lungs.
WordReference Random House Unabridged Dictionary of American English Â© 2016. tread (tred), v., trod, trodâ¢den ortrod, treadâ¢ing, n. v.i. 1  to set down the foot or feet in walking; step; walk.  to step, walk, or trample so as to press, crush, or injure something (usually fol. by on or upon):to tread on a person's foot.
kerb. n. 1. (Civil Engineering) a line of stone or concrete forming an edge between a pavement and a roadway, so that the pavement is some 15 cm above the level of the road.vb.. 'curb'. Curb can be a noun or a verb. If you curb something, you control it and keep it within definite limits. ...proposals to curb the powers of the Home Secretary. You must curb your extravagant tastes. You can say that someone imposes a curb on something. This requires a curb on public spending.