MUSCLES OF RESPIRATION. When the diaphragm contracts in inspiration, initially the lower ribs are fixed and the dome of the diaphragm descends, thus increasing the vertical diameter of thorax.
arrearage. 1  the state or condition of being in arrears. 2  Often, arrearages. arrears; amount or amounts overdue. 3  Archaic. a thing or part kept in reserve.
Definition of 'abreast'. abreast (Ébrest ) If people or things walk or move abreast, they are next to each other, side by side, and facing in the same direction. The steep pavement was too narrow for them to walk abreast. ...a group of youths riding their motorbikes four abreast. Synonyms: alongside, level, beside, in a row More Synonyms of abreast.