• (genetics) a segment of DNA that is involved in producing a polypeptide chain; it can include regions preceding and following the coding DNA as well as introns between the exons; it is considered a unit of heredity
• The (often spherical) end of the head of a hammer opposite the main hammering end.
• Penis.
• The male reproductive organ used for sexual intercourse that in the human male and some other mammals is also used for urination; the tubular portion of the male genitalia (excluding the scrotum).
verb
• To shape metal by striking it, especially with a peen.
• any of three isotopes of a colorless aromatic liquid hydrocarbon occurring in the volatile oil of cumin and thyme and used in the manufacture of synthetic resins
• a flammable colorless gaseous alkene; obtained from petroleum and natural gas and used in manufacturing many other chemicals; sometimes used as an anesthetic
• a flammable colorless gaseous alkene; obtained from petroleum and natural gas and used in manufacturing many other chemicals; sometimes used as an anesthetic
• Any of a class of metallocenes containing an iron atom between two cyclopentadienyl rings; especially the simplest of the class bis-cyclopentadienyl iron.
• a volatile flammable mixture of hydrocarbons (hexane and heptane and octane etc.) derived from petroleum; used mainly as a fuel in internal-combustion engines
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