[pen-uh-sil-in] /ˌpɛn əˈsɪl ɪn/
any of several antibiotics of low toxicity, produced naturally by molds of the genus Penicillium and also semisynthetically, having a bactericidal action on many susceptible Gram-positive or Gram-negative cocci and bacilli, some also being effective against certain spirochetes.
any of a group of antibiotics with powerful bactericidal action, used to treat many types of infections, including pneumonia, gonorrhoea, and infections caused by streptococci and staphylococci: originally obtained from the fungus Penicillium, esp P. notatum. Formula: R-C9H11N2O4S where R is one of several side chains
1929, coined in English by Alexander Fleming (1881-1955), who first recognized its antibiotic properties, from Modern Latin Penicillium notatum (1867), the name of the mould from which it was first obtained, from Latin penicillus “paintbrush” (see pencil (n.)), in reference to the shape of the mould cells.
penicillin pen·i·cil·lin (pěn’ĭ-sĭl’ĭn)
Any of a group of broad-spectrum antibiotic drugs obtained from penicillium molds or produced synthetically, most active against gram-positive bacteria and used in the treatment of various infections and diseases.
An antibiotic drug obtained from molds of the genus Penicillium and used to treat or prevent various infections caused by gram-positive bacteria such as streptococcus. Penicillin was the first of a class of antibiotics (whose names end in -icillin) that are derived from it and are active against a broader spectrum of bacteria. See Note at Alexander Fleming.
An antibiotic that is used to treat infections caused by some kinds of bacteria. Penicillin, which is derived from a common kind of mold that grows on bread and fruit, was the first antibiotic discovered and put into widespread use.
Note: Penicillin was first widely used during World War II.
[pen] /pɛn/ noun 1. any of various instruments for writing or drawing with ink or a similar substance. 2. a detachable metal penpoint, filled by dipping or with a quill; nib. 3. such a penpoint with its penholder. 4. fountain pen. 5. ball-point pen. 6. the pen as the instrument of writing or authorship: The […]
/ˈpɛnrəʊz/ noun 1. Sir Roger. born 1931, British mathematician and theoretical physicist, noted for his investigation of black holes Penrose (pěn’rōz’) British mathematical astronomer and physicist who worked with Stephen Hawking to explain the physics of black hole formation. He is also known for his theories on artificial intelligence.
[pen-suh-koh-luh] /ˌpɛn səˈkoʊ lə/ noun 1. a seaport in NW Florida, on Pensacola Bay. name of a Muskogean tribe, from Choctaw, literally “hair-people,” from pashi “hair of the head” + oklah “people.”
noun 1. an inlet of the Gulf of Mexico, in NW Florida. About 30 miles (48 km) long.