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Babylon English English dictionary

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Ca (calcium)
n. silvery metallic element present in the earth as well as in most animals and plants
ca (circa)
n. around, approximately (used especially with dates)
CA (California)
state on the western coast of the United States
CA (Certificate Authority)
company authorized to issue digital certificates which are used to authenticate a user or organization's identity during secure Internet transactions (Computers)
c.a. (Court of Appeals)
court whose jurisdiction is to review decisions of lower courts or agencies

Wikipedia English The Free Encyclopedia

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CA or ca may refer to:

  • Canadian Academy, an international school in Kobe, Japan
  • Cary Academy, a private college-preparatory school in Cary, North Carolina, United States
  • Claiborne Academy, a private school in Claiborne Parish, Louisiana, United States
  • Clarksville Academy, a private college-preparatory school in Clarksville, Tennessee, United States
  • Colorado Academy, a private college-preparatory school in Lakewood, Colorado, United States
  • Connections Academy, an online school based in Baltimore, Maryland, United States
  • Culver Academies, a boarding school and summer camp program in Culver, Indiana, United States

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Calcium in biology
Calcium ions (Ca2+) play a pivotal role in the physiology and biochemistry of organisms and the cell. They play an important role in signal transduction pathways, where they act as a second messenger, in neurotransmitter release from neurons, in contraction of all muscle cell types, and in fertilization. Many enzymes require calcium ions as a cofactor, those of the blood-clotting cascade being notable examples. Extracellular calcium is also important for maintaining the potential difference across excitable cell membranes, as well as proper bone formation.

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Circa , usually abbreviated c., ca or ca. (also circ. or cca.), means "approximately" in several European languages including English, usually in reference to a date. Circa is widely used in genealogy and historical writing when the dates of events are not accurately known. When used in date ranges, circa is applied before each approximate date, while dates without circa immediately preceding them are generally assumed to be known with certainty. For example:
  • 1732–1799 or 1732–99: both years are known precisely.
  • – 1799: only the end year is known accurately; the start year is approximate.
  • 1732 – : only the start year is known accurately; the end year is approximate.
  • : both years are approximate.

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Circa (disambiguation)
Circa is a Latin word meaning "about" or "around".

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© This article uses material from Wikipedia® and is licensed under the GNU Free Documentation License and under the Creative Commons Attribution-ShareAlike License

WordNet 2.0 Dictionary

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1. a state in the western United States on the Pacific; the 3rd largest state; known for earthquakes
(synonym) California, Golden State, Calif.
(hypernym) American state
(hyponym) Colorado Desert
(part-holonym) United States, United States of America, America, US, U.S., USA, U.S.A.
(part-meronym) Channel Islands National Park


1. a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals
(synonym) calcium, atomic number 20
(hypernym) metallic element, metal
(hyponym) calcium ion, factor IV
(substance-holonym) calcium oxide, quicklime, lime, calx, calcined lime, fluxing lime, unslaked lime, burnt lime

Babylon German English dictionary

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ca. (circa)
ca, approx; circa, approximately, around, nearly, closely, about

Babylon French English dictionary

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CA (Chiffre d'affaire)
annual turnover, yearly rotation, yearly change
CA (Conseil d'Administration)
administrative council
CA (Corps d'Armée)
army corps, army forces, military forces
pron. that, it
nm. id, unconscious part of the psyche which is associated with instinctive impulses (Psychoanalysis)
çà (lo!)
adv. then

| CA in French | CA in Italian | CA in Spanish | CA in Dutch | CA in Portuguese | CA in German | CA in Russian | CA in Japanese | CA in Greek | CA in Korean | CA in Turkish | CA in Hebrew | CA in Arabic | CA in Thai | CA in Polish | CA in Hungarian | CA in Czech | CA in Lithuanian | CA in Latvian | CA in Catalan | CA in Croatian | CA in Serbian | CA in Albanian | CA in Urdu | CA in Bulgarian | CA in Danish | CA in Finnish | CA in Norwegian | CA in Romanian | CA in Swedish | CA in Farsi | CA in Hindi | CA in Indonesian | CA in Vietnamese | CA in Malay | CA in Filipino