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.
Arbitrage. Arbitrage is the technique of simultaneously buying at a lower price in one market and selling at a higher price in another market to make a profit on the spread between the prices.rbitrage is not a long-term investment strategy but a short-term trading strategy to exploit short-term pricing inefficiencies. Arbitrage helps ensure that prices do not deviate too far from an asset's fair value for long periods.