Definition of "hypo" []

• See sodium thiosulfate. (noun)
• A hypodermic syringe. (noun)
• A hypodermic injection. (noun)
• To stimulate by or as if by hypodermic injection: "pandering to community fears in order to hypo ratings” ( Variety). (verb-transitive)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Lincoln certainly had moments of what he called the "hypo," most notably when his first serious crush, Ann Rutledge, died in 1835, and again when he broke up with fiancée Mary Todd on the eve of their nuptials in 1841."
• "Of course your hypo is a much more dramatic example of changing the enforcement mechanism than the one at issue here."
• "Lincoln had within him a terrible bent towards what he called the hypo, what we might today call manic depression."