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• Ca
  Ca

  calcium.
• CA
  CA

  abbreviation

  California (approved especially for use with zip code).
• ca'
  ca'

  verb (used with or without object)

  to call, as to call an animal toward one; urge forward by calling.
• ca-
  ca-

  variant of ker-.
• ca.
  ca.

  abbreviation

  cathode.
• C/A
  C/A

  capital account.
• C.A.
  C.A.

  abbreviation

  Central America.
• ca
  ca

  abbreviation

  Canada

Ca

¹ American  

Symbol, Chemistry.

1. calcium.

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CA ² American  

abbreviation

1. California (approved especially for use with zip code).

2. chronological age.

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ca' ³ American  

[kah, kaw] / kɑ, kɔ /

verb (used with or without object)

Scot.

1. to call, as to call an animal toward one; urge forward by calling.

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ca- ⁴ American  

1. variant of ker-.

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ca. ⁵ American  

abbreviation

1. cathode.

2. centiare.

3. Also ca (with a year) about.

   ca. 476 b.c.

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C/A ⁶ American  

Or c/a

1. capital account.

2. cash account.

3. credit account.

4. current account.

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C.A. ⁷ American  

abbreviation

1. Central America.

2. chartered accountant.

3. Accounting. chief accountant.

4. Coast Artillery.

5. commercial agent.

6. consular agent.

7. controller of accounts.

8. current assets.

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CA ¹ British  

abbreviation

1. California

2. Central America

3. chartered accountant

4. chief accountant

5. consular agent

6. (in Britain) Consumers' Association

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C/A ² British  

abbreviation

1. capital account

2. credit account

3. current account

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Ca ³ British  

symbol

1. calcium

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ca ⁴ British  

abbreviation

1. Canada

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ca. ⁵ British  

abbreviation

1. circa

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Etymology

Origin of ca'³

Variant of call

Origin of ca.⁵

ca. ( def. 3 ) < Latin circā

Example Sentences

In an April 29 press release, Markon Cooperative, a farm-to-table produce cooperative, noted that cauliflower supplies from the Salinas Valley and Santa Maria, CA, are extremely limited.

From Salon • May 27, 2026

He noted in a recent interview with StatNews published last week that his CA 19-9 levels—a common blood marker of pancreatic cancer—had plunged from north of 8,000 to about 374.

From The Wall Street Journal • Apr. 19, 2026

Acton, CA - February 15: Beverages are served at Sunday jazz brunch at Bloom Ranch, a 250-acre Black-owned farm and ranch on the edge of L.A.

From Los Angeles Times • Feb. 27, 2026

The company was founded by Jack Patrick Dorsey and James Morgan McKelvey in February 2009 and is headquartered in Oakland, CA.

From MarketWatch • Feb. 27, 2026

Then I took the envelope from my dresser, postmarked Oakland, CA.

From "P.S. Be Eleven" by Rita Williams-Garcia