Category: L

  • Level of effort

    An expression of the amount of time required to complete a project, often based on labor hours.  

  • Level of confidence

    The probability that the value of a statistic is equal to or exceeds its observed value.  

  • Level of aspiration

    The tendency of persons to set goals in an effort to succeed at the highest possible level while avoiding failure.  

  • Levator pulpebrae

    The muscle that raises the upper eyelid.  

  • Levator ani

    The muscle that draws the anus upward in defecation and aids in the support of the pelvic floor. A muscle of the pelvic floor that supports the pelvic organs. A broad muscle that helps to form the floor of the pelvis.  

  • Levator

    A muscle that serves to raise some part. Muscle that lifts or raises a structure (e.g., levator scapulae, which lifts the shoulder blade). A surgical instrument used for levering up displaced bone fragments in a depressed fracture of the skull. A muscle that raises or elevates a part; opposite of depressor.  

  • Leukoderma

    A deficiency of pigmentation of the skin. Loss of skin pigment in a localized area. Loss of melanin as a result of disease. Deficiency of skin pigmentation, especially in patches. Skin disorder characterized by light abnormal patches (hypopigmentation); caused by a burn or congenital disease that destroys the pigment-producing cells. A persistent, innate skin condition…

  • Leucotomy

    A brain operation involving the severing of association pathways in the frontal lobes of the brain in which the surgical instruments are inserted transor-bitally frontal lobotomy  

  • Leucoplast

    A colorless plastid commonly the center of starch formation.  

  • Lethal gene

    A gene that results in a cell that cannot replicate or the death of the organism. A gene, usually recessive, that results in the premature death of an individual who inherits it, e.g. the gene controlling sickle-cell anaemia. Any gene that produces an effect that causes the death of the organism at any stage, from…