1) AD: Anno Domini
The full form of AD is Anno Domini. It is a Medieval Latin term. It means “in the year of our lord”. This term is used to represent the year after the Christians God Jesus Christ. Sometimes AD is also spelled as After Death which is totally wrong. Actually, this is a misconception because AD and BC both are used to represent years count individually. AD was discovered by a Monk named Dionysius Exiguus. It had replaced the Diocletian era that had been used in old Easter table.
2) BC: Before Christ
The full form of BC is Before Christ. Before Christ (BC) was devised by the Venerable Bede for his “Ecclesiastical History of the English People” in 731. Bede’s book was very popular and helped established the BC/AD system among scholars, particularly after Charlemagne officially adopted it.
Other full forms of AD & BC
| AD Full Form | Category |
| Academic Decathlon | Sports |
| Acción Democrática | International » Guatemalan |
| Accumulation Distribution | Business » General Business |
| Acid Detecting | Academic & Science » Chemistry |
| Active Directory | Internet |
| Active Duty | Governmental » Military |
| Acute Disorder | Medical » Physiology |
| Additional Delivery | Business » General Business |
| ADenovirus | Medical » Physiology |
| Admission and Discharge | Medical » Hospitals |
| Admitting Diagnosis | Medical » Physiology |
| Adult Disease | Medical » Physiology |
| Advanced Development | Governmental » Military |
| Advertisement | Business » General Business |
| ADVO, Inc. | Business » NYSE Symbols |
| After a Date | Governmental » Military |
| After Dark | Community » Performing Arts |
| After Death | Medical » Physiology |
| After Democracy | Governmental » US Government |
| After Dinner | Miscellaneous » Food & Nutrition |
| After the Downfall | Governmental |
| AfterDark Screensaver | Computing » File Extensions |
| Aggregate Demand | Business » General Business |
| Agility Dog | Miscellaneous » Dogs Related |
| Air Defense | Governmental » Military |
| Air Density | Academic & Science » Meteorology |
| Air Division | Governmental » Air Force |
| Air Dried | Miscellaneous » Food & Nutrition |
| Alfred Daniel | Miscellaneous » Names and Nicknames |
| All Day | Business » Occupation & Positions |
| Allowable Deductions | Governmental » US Government |
| Almost Dead | Governmental » Police |
| Alternating Days | Medical » Physiology |
| Always Demanding | Business » Occupation & Positions |
| Always Dependable | Business » Occupation & Positions |
| Alzheimer’s Disease | Medical » Physiology |
| AMD Corporation | Governmental » Suppliers |
| American Dog | Miscellaneous » Dogs Related |
| Amoebic Dysentery | Medical » Hospitals |
| Analog Disc | Computing » Hardware |
| Anatomic Design | Medical » Laboratory |
| Ancient Dragon | Miscellaneous » Science Fiction |
| And Do …. | Computing » Texting |
| Andorra, Principality of | Regional » Countries |
| Anomalous Dispersion | Academic & Science » Meteorology |
| Ante Diem (before the day) | Miscellaneous » Days Abbreviations |
| Anti Dumping | Governmental » US Government |
| Anti-Diversity | Governmental » Politics |
| Aortic Diameter | Medical » Physiology |
| Application Development | Computing » Software |
| Applications Development | Computing » Software |
| Architectural Digest | Academic & Science » Architecture |
| Armored Division | Governmental » Military |
| Art Director | Business » Occupation & Positions |
| Artist Designer | Academic & Science » Architecture |
| Asamblea Democrática | International » Spanish |
| Assistant Deputy | Business » Occupation & Positions |
| Assistant Director | Business » Occupation & Positions |
| Associate Degree | Academic & Science » Academic Degrees |
| Associate Director | Governmental » Military |
| Astronomsko Drustvo | Academic & Science » Astronomy |
| Attack Damage | Governmental » Military |
| Attention Deficit | Medical » Physiology |
| Audio Disk | Community » News & Media |
| Auditory Discrimination | Medical » Physiology |
| Aunt Dorothy | Miscellaneous » Names and Nicknames |
| Auris Dexter (Right Ear) | Medical » Physiology |
| Außer Dienst | International » German |
| Auto Date | Business » General Business |
| Average Difference | Academic & Science » Mathematics |
| Aviation Division | Academic & Science » Ocean Science |
| Awesome Dude | Internet » Chat |
| BC Full Form | Category |
| Back Care | Medical » Physiology |
| Backward Class | General |
| Backward Compatibility | Computing » Software |
| Bad Cat | Miscellaneous » Unclassified |
| Bad Choice | Miscellaneous » Unclassified |
| Baguio City | Regional |
| Baja California | International » Mexican |
| Bankruptcy Court | Governmental » Law & Legal |
| Baptist Church | Community » Religion |
| Bar Code | Business » Products |
| Base Curve | Medical » Laboratory |
| Basic Component | Computing » General Computing |
| Bat Cave | Governmental » State & Local |
| Battery Check | Governmental » Transportation |
| Battle Command | Governmental » Military |
| Bayou City | Regional » Cities |
| Be Compassionate | Community » Educational |
| Bear Conservation | Governmental » US Government |
| Bear Country | Miscellaneous » Unclassified |
| Beautiful Country | Miscellaneous » Unclassified |
| Beauty Contest | Community » Fashion & Beauty |
| Because | Internet » Chat |
| Bechtel Corporation | Business » Companies & Firms |
| Before Canada | Miscellaneous » Funnies |
| Before Castro | Governmental » US Government |
| Before Children | Miscellaneous » Funnies |
| Before Christmas | Miscellaneous » Unit Measures |
| Before Computers | Miscellaneous » Funnies |
| Before Credit | Business » Accounting |
| Best Chance | Miscellaneous » Unclassified |
| Better Choice | Miscellaneous » Unclassified |
| Big C | Miscellaneous » Unclassified |
| Big Cash | Miscellaneous » Unclassified |
| Big Cat | Miscellaneous » Names and Nicknames |
| Big Country | Governmental » State & Local |
| Big Cuts | Miscellaneous » Unclassified |
| Binary Calculator | Miscellaneous » Unclassified |
| Binary Counter | Computing » General Computing |
| Birth Certificate | Community |
| Birth Control | Medical » Physiology |
| Birth Control Pills | Medical » Physiology |
| Black Canyon | Academic & Science » Geology |
| Black Cat | Miscellaneous » Names and Nicknames |
| Black Chrome | Miscellaneous » Colors |
| Blind copy | Business » General Business |
| Board Certified | Medical » Hospitals |
| Body Count | Governmental » Military |
| Bomber Command | Governmental » Military |
| Bone Conduction | Medical » Physiology |
| Book Club | Community » Educational |
| Booty Call | Miscellaneous » Funnies |
| Border Collie | Miscellaneous » Dogs Related |
| Boron Carbide | Academic & Science » Chemistry |
| Boston College | Academic & Science » Colleges |
| Boundary Condition | Academic & Science » Physics |
| Boundary Current | Academic & Science » Ocean Science |
| Branch Cuts | Academic & Science » Botany |
| Bravo Charlie | Governmental » Navy |
| Breast Cancer | Medical » Oncology |
| Brian Chan | Miscellaneous » Unclassified |
| Bright Colors | Miscellaneous » Colors |
| Bring Cash | Miscellaneous » Funnies |
| British Columbia | Regional » Canadian |
| Broome County | Regional » States |
| Brown Cow | Miscellaneous » Unclassified |
| Brunswick Corporation | Business » NYSE Symbols |
| Budget Constraint | Business » Accounting |
| Building and Construction | Business » Companies & Firms |
| Buoyancy Compensator | Governmental » Transportation |
| Burbank, California | Regional » States |
| Business Center | Business » General Business |
| Business Confidence | Business » General Business |
| Buy Canon | Miscellaneous » Unclassified |
| Buying Criteria | Business » Accounting |
| Committed Burst size | Computing » Telecom |