1) Ng 
Describes the passage from the nose to the stomach. For example, a nasogastric tube is inserted through the nose, down the throat and esophagus, and into the stomach.
Pertaining to or involving the nasal passages and the stomach, as in nasogastric intubation. ... (05 Mar 2000) ... 
Type: Term Pronunciation: nā′zō-gas′trik Definitions: 1. Pertaining to or involving both the nasal passages and the stomach, as in nasogastric intubation.
Nasogastric: Referring to the passage from the nose to the stomach. A nasogastric tube is one that is passed through the nose (via the nasopharynx and esophagus) down into the stomach. The abbreviation for nasogastric is NG. The tube is an NG tube. 'Nasogastric' is a hybrid -- part Latin, part Greek. 'Naso-' is a prefix that has to do with the nose...
of, pertaining to, or involving the nose and stomach.