AskDefine | Define pus

Dictionary Definition



1 the tenth month of the Hindu calendar [syn: Pansa]
2 a fluid product of inflammation [syn: purulence, suppuration, ichor, sanies, festering]

User Contributed Dictionary

see puss



  • , /pʌs/, /pVs/
    Rhymes with: -ʌs


  1. A whitish-yellow or yellow substance made primarily of dead white blood cells and dead bacteria; normally found in regions of bacterial infection.

Derived terms


fluid found in regions of infection



Compare Italian pozzo.


  1. well


Etymology 1

From pouvoir

Verb form

  1. First-, second-person singular indicative past historic of pouvoir.
  2. Masculine plural of pu, past participle of pouvoir.

Etymology 2

From paître

Verb form

  1. First-, second-person singular indicative past historic of paître.

Etymology 3


  1. pus



  • lang=ga|[pˠʊsˠ]


  1. pout
  2. snout




  1. pus, matter


  1. cat






ro-pp-s pu

Extensive Definition

Pus is a whitish-yellow or yellow substance produced during inflammatory responses of the body that can be found in regions of pyogenic bacterial infections. An accumulation of pus in an enclosed tissue space is known as an abscess. A visible collection of pus within or beneath the epidermis, on the other hand, is known as a pustule or pimple. Pus is produced from the dead and living cells which travel into the intercellular spaces around the affected cells.
Something that creates pus is called suppurative, pyogenic, or purulent. If it creates mucus as well as pus, it is called mucopurulent.
Pus consists of a thin, protein-rich fluid, known as liquor puris, and dead cells, which are part of the body's innate immune response. Neutrophils are produced in the bone marrow and released into the blood. When the need to fight infection arises, they move to the site of infection by a process known as chemotaxis, usually triggered by cytokines released from macrophages that sense invading organisms. At the site of infection, they engulf and kill bacteria. Eventually, the neutrophils die, and these dead cells are then phagocytosed by macrophages, which break them down further. Pus, therefore, is the viscous material composed of these dead neutrophils.
Neutrophils are the most abundant type of leukocyte in human blood, comprising anywhere between 40% to 75% of leukocytes.
When seen in a wound or dry skin, pus indicates the area is infected and should be cleaned with antiseptic.
Despite normally being of a whitish-yellow hue, changes in the color of pus can be observed under certain circumstances. Pus is sometimes green because of the presence of myeloperoxidase, an intensely green antibacterial protein produced by some types of white blood cells. Blue pus is found in certain infections of Pseudomonas aeruginosa as a result of the pyocyanin bacterial pigment it produces; amoebic abscesses of the liver, meanwhile, produce brownish pus. Pus might have a reddish tint to it after mixing with blood. Pus can also have a foul odor.
pus in Arabic: قيح
pus in Catalan: Pus
pus in Czech: Hnis
pus in Danish: Materie
pus in German: Eiter
pus in Esperanto: Puso
pus in Spanish: Pus
pus in Estonian: Mäda
pus in French: Pus
pus in Hebrew: מוגלה
pus in Italian: Pus
pus in Japanese: 膿
pus in Latin: Pus
pus in Malay (macrolanguage): Nanah
pus in Dutch: Pus
pus in Polish: Ropa (medycyna)
pus in Portuguese: Pus
pus in Russian: Гной
pus in Swedish: Var (medicin)
pus in Tagalog: Nana
pus in Turkish: İrin
pus in Chinese: 膿

Synonyms, Antonyms and Related Words

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