Levothyroxine
A synthetic thyroid hormone used as a thyroid hormone replacement drug (brand names include Levothroid, Levoxine, Levoxyl, Synthroid) used to treat an underactive thyroid gland (hypothyroidism).
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- Lewis, Edward B
“The genes that Edward Lewis discovered have in fact the same order in our DNA as in that of the fruit fly, and they work in the same way. The knowledge gained about the development of the fruit fly has thus been a prerequisite for the recent advances in understanding how vertebrates develop.” As a […]
- Lhermitte sign
“Looking down to sign a hotel register, I felt a spasm like an electric current move along my back from the base of my skull to my toes. Every time I repeated the movement, the spasm recurred.” The causes of Lhermitte sign include multiple sclerosis (MS), radiation damage to the spinal cord), cervical spondylosis (degeneration […]
- LHRH agonist
A compound that is similar to luteinizing hormone-releasing hormone (LHRH) in structure and can act like LHRH.
- Li-Fraumeni syndrome (LFS)
the p53 tumor-suppressor gene. LFS has been of considerable importance to the understanding of the genetics and molecular biology of cancer.
- Libido
1. Sexual drive. 2. In psychoanalysis, the psychic energy from all instinctive biological drives. Libido in Latin means “desire, longing, fancy, lust, or rut.” Although the adjective libidinous, meaning lustful, has been used in English for 500 or so years, libido only entered the language in 1913, thanks to Sigmund Freud and other psychoanalysts who […]