| NIV | nodule-inducing virus |
|---|---|
| SAN | sinoatrial node; sinoauricular node; slept all night; solitary autonomous nodule |
| SE | saline enema; sanitary engineering; side effect; smoke exposure; solid extract; sphenoethmoidal; spi... |
| SPN | senior plan network; sialophorin; solitary pulmonary nodule; supplemental parental nutrition; sympat... |