Webster's English Dictionary

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hypo

1. hy.po \'hi--(.)po-\ n : HYPOCHONDRIA 
2. hypo n [short for hyposulfite] : sodium thiosulfate used as a fixing 
   agent in photography 
3. hypo n 1: HYPODERMIC SYRINGE  2: HYPODERMIC INJECTION  3: STIMULUS 
4. hypo vt : STIMULATE