Dictionary

RUL Right upper lobe, the upper-right lobe of the lung.

RUQ Right upper quadrant, the upper-right quarter of the abdomen.

RV Rotavirus.

Rx 1 On a prescription, abbreviation for recipe (Latin for “to take”). See also Appendix A, “Prescription Abbreviations.” 2 In a pharmacological catalog, an indicator that one will need a prescription to buy a listed item.

SA node Sinoatrial node.

Sabin vaccine See polio vaccine, oral.

sac, egg See ovary.

sac, pericardial See pericardium.

saccular Being like a small pouch. For example, the alveolar saccules are little air pouches within the lungs.

saccular aneurysm See aneurysm, saccular.

sacral Referring to the sacrum. For example, sacral agenesis is absence of all or part of the sacrum.

sacral agenesis Absence of all or part of the sacrum. See also caudal regression syndrome; sacrum.