A class of trees that have broad, flat leaves of many different shapes; most are deciduous; also called hardwood because most broad-leaved trees have harder wood than do conifers. Examples include oak, hickory, maple and ash. A narrow zone or strip of land, trees or vegetation bordering an area. Common examples include visual buffers, which screen the view along roads, and streamside buffers, which are used to protect water quality. Buffers may also be used to prevent the spread of forest pests.
Medical Definition of id. : the one of the three divisions of the psyche in psychoanalytic theory that is completely unconscious and is the source of psychic energy derived from instinctual needs and drivesâcompare ego, superego.
of, relating to, or used in diagnosis. serving to identify or characterize; being a precise indication. diagnosis (def 1). a symptom or characteristic of value in diagnosis. Medicine/Medical. a device or substance used for the analysis or detection of diseases or other medical conditions.