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Medical Terminology
| Term | Definition |
|---|---|
| A- | no; not; without |
| an- | No; not; without |
| Ab | Away from |
| Abdomin/o | Abdomen |
| -ac | Pertaining to |
| Acanth/o | Spiny; thorny |
| Acar/o | Mites |
| Acetabul/o | Acetabulum (hip socket) |
| Acous/o | Hearing |
| Acoust/o | Hearing, sound |
| Acr/o | Extremities; top; extreme point |
| Acromi/o | Acromion (extension of shoulder bone) |
| Actin/o | Light |
| Acu/o | Sharp; severe; sudden |
| -acusis | Hearing |
| Ad- | Toward |
| -ad | Toward |
| Aden/o | Gland |
| Adenoid/o | Adenoids |
| Adip/o | Fat |
| Adren/o | Adrenal gland |
| Adrenal/o | Adrenal gland |
| Aer/o | Air |
| Af- | Toward |
| Agglutin/o | Clumping; sticking together |
| -agogue | Producer; leader |
| -agon | To assemble; gather |
| Agora- | Marketplace |
| -agra | Excessive pain |
| -al | Pertaining to |
| Alb/o | White |
| Albin/o | White |
| Albumin/o | Albumin (protein) |
| Alges/o | Sensitivity to pain |
| -Algesia | Sensitivity to pain |
| -algia | Pain |
| All/o | Other |
| Alveol/o | Alveolus;air sac; small sac |
| Ambi- | Around, on both sides |
| -amine | Nitrogen compound |
| Ammon/o | Ammonium |
| Amni/o | Amnion (sac surrounding the embryo) |
| Amyl/o | Starch |
| An/o | Anus |
| -an | Pertaining to |
| Ana- | Up; apart; backward; again; anew |
| Andr/o | Male |
| Aneurysm/o | Aneurysm (widening of blood vessel) |
| Angi/o | Vessel (blood) |
| Anis/o | Unequal |
| Ankyl/o | Stiff |
| Ante- | Before; forward |
| Anter/o | Front |
| Anthrac/o | Coal |
| Anthr/o | Antrum of the stomach |
| Anti- | Against |
| Anxi/o | Uneasy; anxious |
| Aort/o | Aorta (largest artery) |
| -apheresis | Removal |
| Aphth/o | Ulcer |
| Ap- | Off; away |
| Aponeur/o | Aponeurosis (type of tendon) |
| Append/o | Appendix |
| Appendic/o | Appendix |
| Aque/o | Water |
| -ar | Pertaining to |
| Arachn/o | Spider |
| -arche | Beginning |
| Arsenic/o | Arsenic |
| Arter/o | Artery |
| Arteri/o | Artery |
| Arteriol/o | Arteriole (small artery) |
| Arthr/o | Joint |
| -arthria | Articulate (speak distinctly) |