ca.
Around that time
Ca. is an abbreviation for circa, meaning approximately or around, used before dates or quantities whose exact value is uncertain: The manuscript dates to ca. 1450.
Common in academic writing, historical texts, and museum labels.
Sometimes written without the period.
Close but not exact
- aroundIn the vicinity
- aboutConcerning or approximately
- roughlyIn approximate terms
- estimatedRoughly calculated beforehand
near · close to · ballpark · imprecise · dating · historical · timeline · era
Element twenty, builds bones
- elementBasic substance or factor
- periodic tableSystematic display of elements
- mineralNaturally formed crystalline solid
- ionCharged atom or molecule
atomic · cation · carbonate · oxide · supplement · bone · dairy · electrolyte
West coast megastate
- CanadaNorthern North American nation
- Central AmericaIsthmus connecting two continents
- chartered accountantCredentialed financial auditor
- certificateFormal written attestation
certification · abbreviated · shorthand · initials · acronym · postal · state · province
approximately
Close but not exact
estimated · near · close to · ballpark · imprecise · dating · historical · timeline · era · century
calcium
Element twenty, builds bones
- elementBasic substance or factor
- periodic tableSystematic display of elements
- mineralNaturally formed crystalline solid
ion · atomic · cation · carbonate · oxide · supplement · bone · dairy · electrolyte · alkaline earth
California
West coast megastate
- CanadaNorthern North American nation
- Central AmericaIsthmus connecting two continents
- chartered accountantCredentialed financial auditor
certificate · certification · abbreviated · shorthand · initials · acronym · postal · state · province · designation
C major
Key lacking accidentals
solfege · tone · key · octave · clef · staff · notation · sharp · flat · natural