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.
augur (third-person singular simple present augurs, present participle auguring, simple past and past participle augured) 1  To foretell events; to exhibit signs of future events. 2  To anticipate, to foretell, or to indicate a favorable or an unfavorable issue. to augur well or ill.