| C. | Cape; Centigrade; centre (stage); Chancellor; club (cards); cold (tap); Conservative; Consul; one hundred (Roman). |
| c. | Caught (cricket); cent(-s); centime(-s); circa (Latin), about; contra (Latin), against; contralto. |
| C.A. | Central America; Court of Appeal. |
| C/A. | Capital account. |
| ca. | Circa (Latin), about. |
| cal. | Calendar; calorie. |
| Calif. | California. |
| Cambs. | Cambridgeshire. |
| Can. | Canada; Canon; cantoris (Latin), of the choir. |
| Canpae. | Canadian Pacific Railway. |
| Cant. | Canticles (Song of Solomon). |
| Cantuar | Cantuariensis (Latin), of Canterbury (Abp.'s signature). |
| cap. | Capital letter; chapter; number of an Act of Parliament. |
| car. | Carat. |
| Cards. | Cardiganshire. |
| Carliol | Carliolemis (Latin), of Carlisle (Bp.'s signature). |
| Cas. | Castle. |
| Cath. | Cathedral; Catholic. |
| C.C. | Cape Colony; Circuit Court; Civil Court; County Council(-lor); County Court; curate in charge. |
| cc. | Chapters. |
| c.c. | Contra credit; cubic centimetre(-s); cubic contents. |
| C.C.C. | Central Criminal Court. |
| C.C.P. | Court of Civil Procedure. |
| C.Cr.P. | Court of Criminal Procedure. |
| C.D. | Civil death; contagious diseases. |
| c.d. | With dividend. |
| C.E. | Chief engineer; civil engineer; Church of England. |
| Cels. | Celsius. |
| Cent. | Centigrade; Central; century. |
| cert. | Certainty; certificate. |
| Cestr | Cestriensis (Latin), of Chester (Bp.'s signature). |
| cet. par. | Ceteris paribus (Latin), other things being equal. |
| cf. | Confer (Latin), compare. |
| c.f. | Carried forward. |
| c.f.i. | Cost, freight, insurance. |
| C.G. | Centre of gravity; coastguard. |
| cg. | Centigramme-(s). |
| Ch. | Chancery; chaplain; chief; church. |
| ch. | Chain (measure); champion (dogs); chapter; child. |
| cha. | Chapel. |
| Chron. | Book of Chronicles. |
| C.I. | Cast iron; Channel Islands. |
| Cicestr | Cicestriensis (Latin), of Chichester (Bp.'s signature). |
| C.I.D. | Criminal Investigation Department. |
| Cie. | Compagnie (French), company. |
| c.i.f.(c.) | Cost, insurance, freight (commission). |
| circ. | Circiter (Latin), about. |
| cl. | Centilitre(-s); class; classical; clause. |
| Clar. | Clarinet. |
| C.L.P.A. | Common Law Procedure Act. |
| C.M. | Common measure (music). |
| cm. | Centimetre(-s). |
| C.M.D. | Common measure double. |
| Cn. | Canon (law). |
| C.N.R. | Canadian National Railways. |
| C.O. | Colonial Office; conscientious objector; Crown Office. |
| co. | Company; county. |
| c/o | Care of. |
| C.O.D. | Cash on delivery; Concise Oxford Dictionary. |
| C. of E. | Church of England. |
| C. of S. | Church of Scotland. |
| Col. | Epistle to the Colossians. |
| col. | College; colon (currency); colour; column. |
| Coll. | College. |
| coll. | Collect(-ion); colloquial. |
| Colo. | Colorado. |
| Com. | Commissioner; committee; Communist. |
| comp. | Comparative; compositor; compound. |
| Con. | Conies; Consul. |
| con. | Contra (Latin), against. |
| cond. | Conditional. |
| Conf. | Conference; Confucius. |
| Cong. | Congregational(-ist); Congress. |
| conj. | Conjugation; conjunction. |
| Conn. | Comment; Connecticut. |
| Cons. | Conservative. |
| cons. | Consonant. |
| Consols. | Consolidated Funds. |
| Cor. | Corinthian (architecture); Cornu (Latin), horn (music); Epistle to the Corinthians. |
| corr. | Corrigenda (Latin), corrections to be made. |
| cox. | Coxswain. |
| coy. | Company. |
| C.P. | Cape Province; Carter Paterson; Central Provinces (India); chromium plated; Civil Procedure; Common Prayer; Communist Party; concert party. |
| c.p. | Candle power; carriage paid. |
| C.P.R. | Canadian Pacific Railway. |
| Cr. | Creditor; Crown. |
| cr. | Created; crown (paper size). |
| Cres. | Crescent. |
| cresc. | Crescendo (Italian), becoming louder. |
| crim. con. | Criminal conversation (adultery). |
| Cr. P. | Criminal Procedure. |
| crt. | Court. |
| C.S. | Chief Secretary; Civil Service. |
| cs. | Cases (commerce). |
| cts. | Centimes; cents. |
| cu., cub. | Cubic. |
| C.U.P. | Cambridge University Press. |
| c.v.d. | Cash against documents. |
| C.W. | Common Wealth. |
| c.w.o. | Cash with order. |
| C.W.S. | Co-operative Wholesale Society. |
| cwt. | Hundredweight. |
| cyl. | Cylinder. |