1. a hypodermic needle or syringe
Usage: informal
2. sodium thiosulfate used as a photographic fixing agent
Usage: photography
3. hypoglycemia; abnormally low blood sugar
Usage: medical; informal

Examples

• The nurse prepared the hypo for the vaccination.
• The diabetic patient felt dizzy during a hypo episode.
• The photographer mixed fresh hypo to develop the film.
• She always carries glucose tablets in case of a hypo.
• The doctor administered the medication with a hypo.
• After using hypo, the photographic prints were properly fixed.
• His hypo was caused by skipping breakfast and taking insulin.