Part V | Appendixes | 5 - Glossary

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APPENDIX 5 - GLOSSARY

AGENESIS - Incomplete or imperfect development.

ALOPECIA - Partial or complete loss of hair.

ANOREXIA - Absence of appetite.

ANTIGEN - Any substance that stimulates the production of antibody or reacts with antibody.

ARBOVIRUS - A virus transmitted by blood-sucking arthopods (e.g., mosquitoes and ticks).

ARTHROGRYPOSIS - Rigid fixation of the joints; usually in flexion but occasionally in extension.

ASCITES - An abnormal accumulation of serous (watery) fluid in the abdominal cavity.

ATROPHY - Reduction in size of a previously normal-sized organ.

BRACHYGNATHISM - An abnormally shortened lower jaw.

CROUPOUS MEMBRANE (synonym— diptheric membrane) - A fibrinous exudate that is readily loosened from the underlying tissue.

DERMIS - Layer of connective tissue between the epidermis and the subcutaneous tissue.

DIPTEROUS - Denotes an insect having two wings.

DYSCRASIA - A morbid condition, especially involving imbalances of essential bodily fluid components.

DYSPNEA - Difficult or labored breathing.

ECCHYMOTIC HEMORRHAGE - An area of hemorrhage somewhat larger than a petechia.

EMPHYSEMATOUS - Denotes accumulation of air in tissues or organs — especially applied to abnormal accumulations of air in the lungs.

ENDEMIC - Denotes a disease that occurs more or less constantly in any locality.

ENTEROCOLITIS - Inflammation of the small and large intestine.

ENZOOTIC - Denotes a disease present in a community at all times but that affects only a small number of animals.

EOSINOPENIA - A state of having a subnormal number of eosinophilic leukocytes in the blood.

EPENDYMA - The lining membrane of the cerebral ventricles and central canal of the spinal cord.

EPENDYMITIS - Inflammation of the ependyma.

EPIDEMIC - An unusual prevalence of a disease affecting large numbers over a wide area.

EPIDEMIOLOGY (epizootiology) - The study of epidemics; the science of dealing with the various factors that determine the frequencies and distribution of an infectious disease.

EPIDERMIS - The protective outer layer of the skin.

EPIGASTRIC - Pertaining to the upper middle part of the abdomen, including the area over and in front of the stomach.

EPIZOOTIC - Attacking many animals of one kind in any region simultaneously; widely diffused and rapidly spreading.

EROSION - Loss of a surface area by inflammation or trauma; does not involve deeper tissues.

ERYTHROCYTE - A red blood cell.

EXANTHEMA - An eruption on the skin.

FASCIA LATA - The connective tissue surrounding the muscles of the thigh.

FETID - Having a foul odor.

FOMITES - Substances that absorb, hold, and transport infectious disease agents.

HEMATEMESIS - The vomiting of blood.

HEMATOPHAGOUS - Denotes a bloodsucking insect.

HEMOGLOBINURIA - The presence of hemoglobin in the urine.

HYDRANENCEPHALY - Complete or almost complete absence of the cerebral hemispheres. The space is filled with cerebrospinal fluid.

HYDROPERICARDIUM - Excessive collection of serous fluid in the pericardial sac.

HYDROTHORAX - Excessive collection of serous fluid in the thoracic cavity.

HYPEREMIA - An increased amount of blood in a part with distention of blood vessels.

HYPOPLASIA - Defective development of any tissue, organ, limb, etc.

HYPOPYON - A collection of pus in the anterior chamber of the eye.

HYPOTHERMIC - Denotes a subnormal temperature of the body.

INFARCT - A region of dead tissue due to a complete interference with blood flow.

INTRACEREBRAL - In the cerebral hemisphere of the brain.

INTRAERYTHROCYTIC - In the red blood cell.

KYPHOSIS - Convex curvature of the spine.

LAPAROTOMY - An operation opening the abdomen by an incision through the abdominal wall.

LEPTOMENINGITIS - An inflammation of the membranes covering the brain and spinal cord.

LESION - An alteration in structure or function resulting from injury or disease.

LEUKOPENIA - A state of having a subnormal number of white blood cells in the blood.

LYMPHADENOPATHY- An enlargement of the lymph nodes.

MELENA - Black stools caused by bleeding in the stomach or small intestine.

MENINGOENCEPHALITIS - Inflammation of the brain and its membranes.

MICROENCEPHALY - A condition of having a smaller than normal brain.

MORBIDITY - The ratio of the number of sick animals to the total number of animals in the herd or flock.

MORTALITY - The ratio of the number of dead animals to the total number of animals in the herd or flock.

MUCOPURULENT - A creamy exudate consisting of mucus and cells (pus).

MUTAGEN - A substance that can cause a genetic change.

NECROTIC - Denotes a dead cell or group of cells in contact with living cells.

NYSTAGMUS - An oscillatory movement of the eyeballs.

OPHTHALMIA - An inflammation of the eye, especially one in which the conjunctiva is involved.

ORCHITIS - Inflammation of the testis.

PARENCHYMA - The essential or specialized part of an organ as distinguished from the supporting tissue.

PARESIS - A slight paralysis; weakness of a limb.

PARIETAL - Forming or situated on the wall.

PATHOGNOMONIC - Characteristic of a disease; denotes a factor distinguishing it from other diseases.

PERCUTANEOUS - Performed through the skin.

PETECHIAL HEMORRHAGES - Tiny hemorrhages not much larger than a point of a pin.

PHOTOPHOBIA - Intolerance or fear of light; hypersensitivity to light.

POLYARTICULAR - Affecting many joints.

PORENCEPHALY - Congenitally deficient development of the cerebral cortex and gray matter so that cystic cavities communicate with the brain surface.

PSEUDOMEMBRANE - A layer of fibrin that at times is dense and tough and forms a white or yellowish sheet over a surface.

PURULENT - Containing, consisting of, or forming pus.

RETINOPATHY - Any disease condition of the retina.

SCOLIOSIS - Lateral curvature of the spine.

SENTINEL - An animal used to detect the presence of a disease.

SEPTICEMIC - A systemic disease produced when a microorganism and its products are in the blood.

SEROSANGUINEOUS - Containing both serum and blood.

SPLENOMEGALY - Enlargement of the spleen.

STEATOSIS - Fatty degeneration.

SYNOVITIS - Inflamation of the lining of the joints.

THROMBOCYTOPENIA - A state of having a subnormal number of platelets in the blood.

TORTICOLLIS - Wryneck; a contraction of muscles in the neck resulting in an abnormal position of the head.

TRANSOVARIAL - Denotes passage through the egg to the next generation.

TRANSPLACENTAL - Passes through the placenta to the fetus.

TRANSSTADIAL - Passes from one stage of development to the next (e.g., nymphal to adult stage of the tick).

ULCERATION - A break in the continuity of the surface with exposure of the underlying tissue.

VASCULITIS - Inflammation of blood or lymph vessels.

VESICLE - A circumscribed cavity in the epidermis filled with serum, plasma, or blood and covered by a thin layer of epidermis that is greatly elevated above the surface.

VIREMIA - Presence of virus in the blood.

VIRULENCE - The disease producing power of a microorganism.

VISCERA - The internal organs of the body; especially those in the thoracic and abdominal cavities.

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