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.
Arrearage/Arrears from Glossary of Child Support Terms (2016) by Arizona Department of Economic Security The total unpaid support obligation owed by a person under a court order to pay support.