Substance


1. Material with particular features.
2. The material that makes up an organ or structure. Also known in medicine as the substantia.

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  • Substance abuse

    Recurrent substance use resulting in a failure to fulfill major role obligations at work, school, or home (e.g., repeated absences or poor work performance related to substance use; substance-related absences, suspensions or expulsions from school; neglect of children or household) Recurrent substance use in situations in which it is physically hazardous (e.g., driving an automobile […]

  • Subtotal hysterectomy

    The uterus is surgically removed but the cervix is left is left in place. Also called a partial hysterectomy (or supracervical hysterectomy).

  • Subungual onychomycosis, proximal white

    The rarest form of fungus infection of the finger or toenail. (Fungus infection of the finger or toenail is also called onychomycosis.) The infection begins in the nail fold (the portion of the nail opposite the tip of the finger). Proximal white subungual onychomycosis is typically associated with HIV infection (AIDS), though it can follow […]

  • Subutex

    Brand name for buprenorphine.

  • Subway diet

    The Subway diet is a weight loss plan popularized in 2004 by Jared Fogle, who claims that he lost over 245 pounds in one year by eating sandwiches from the Subway chain. Fogle replaced his 10,000 calorie per day food consumption with one small turkey sub and one large veggie sub along with some baked […]


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