List of Biology Terms That Start with a
Here is the list of main Biology terms that start with a Feel free to scroll down to search for a biology term. There are so many Biology terms that start with the alphabet “a” but I have listed here the most important one included in the syllabus of Secondary and higher school biology.
ABIOTIC: Non-living components of the environment such as water, sunlight, soil, heat, etc.
ACID RAIN: Rain containing sulfuric acid and nitric acid; with a pH range of 3 to 6
ACROMEGALY: Abnormal growth due to excessive production of growth hormone after growing old; only the internal organs and extremities of the body grow larger, and sufferers have large hands, feet, and jaws.
ACROSOME: A cap-shaped sperm head that helps it enter the egg.
ADDICTIVE DRUG: The drug that makes a person dependent, or addicted
ADRENAL CORTEX: The outer part of the adrenal gland; secretes corticosteroids
ADRENAL MEDULLA: The inner part of the adrenal gland; epinephrine or adrenaline secrets
ADRENALINE: epinephrine; a hormone that prepares the body to overcome emergency situations; a neurotransmitter produced by certain nerve cells
ALLELE: The alternate form of a gene
ALTERNATION OF GENERATIONS: In plants, the phenomenon of alternation of generations of sporophytes and gametophytes
ALVEOLAR CANAL: Fine tubes at the end of the bronchioles; open in the alveoli
ALVEOLUS: A sac-like structure present next to the alveolar duct in the lungs
AMMONIFICATION: The breakdown of proteins in dead plants and animals, and nitrogenous wastes into ammonia by ammonia-forming bacteria
PAIN RELIEVER: Medicines that reduce pain
ANDROECIUM: The male reproductive whorl of the flower; consists of stamens
ANTHER: The sac-like structure of a stamen in which pollen grains are produced
ANTIBIOTICS: Drugs that inhibit or kill bacteria
ANTIDIURETIC HORMONE: The hormone of the posterior pituitary gland; promotes the reabsorption of water in the kidney tubules
APPENDICULAR SKELETON: the division of the skeleton that includes the arms, hands, legs, feet, shoulder girdle, and pelvic girdle
WATERY HUMOR: The fluid in the anterior chamber of the eye, that is, between the cornea and the iris
ARTHRITIS: Terms used for inflammation in the joints
ARTIFICIAL SELECTION: Selective breeding; intentional reproduction between individuals for certain traits, or combination of traits
ASPIRIN: acetaminophen; Pain medication
ASTHMA: An inflammation of the bronchi that causes swelling and narrowing of the airways