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/pəˈtājēəm/ Noun, pl. patagia 1. The thin membrane that extends between the limbs and body of a bat or of gliding mammals. ( 2. A similar membrane between the body and wing of a bird. ( 3. The fold of skin connecting the forelimbs and hind limbs of some tetrapods (as flying squirrels). ( 4. A lobe that covers the wing joint in many moths. (Google...

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/pəˈtɛlə/ Noun, plural patellas or patellae Also know as the kneecap or kneepan. 1. a thick flat triangular movable bone that forms the anterior point of the knee, protects the front of the joint, increases the leverage of the quadriceps, and is usually regarded as a sesamoid bone since it is developed in the tendon of the quadriceps and in structure is similar to other sesamoid bones. ( 2. The sesamoid bone of the knee; the kneecap. ( 3. A dish-shaped anatomical formation. ( Word origin: From Latin patella “pan, kneecap,” diminutive of patina “pan”. So called from its...

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/ˈpaTHəjən/  /-ˌjen/ Noun, pl. pathogens 1. An infectious agent (colloquially known as a germ); a microorganism—in the widest sense, such as a virus, bacterium, prion, or fungus—that causes disease in its host. The host may be an animal (including humans), a plant, or even another microorganism. ( 2. Any organism or substance, especially a microorganism, capable of causing disease, such as bacteria, viruses, protozoa or fungi. Microorganisms are not considered to be pathogenic until they have reached a population size that is large enough to cause disease. ( 3. A specific causative agent (as a bacterium or virus) of disease. ( 4. An agent causing disease or illness to its host, such as an organism or infectious particle capable of producing a disease in another organism. ( Syn: infectious agent, germ Word origin: From Greek pathos, “suffering,emotion” + gene, “to give birth...

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Noun 1. (medicine) The branch of medicine concerned with the study of the nature of disease and its causes, processes, development, and consequences. ( 2. Any deviation from a healthy or normal condition; abnormality. ( 3. The precise study and diagnosis of disease. ( 4. A specialty concerned with the nature and cause of disease as expressed by changes in cellular or tissue structure and function caused by the disease process. (   Syn: pathobiology Word origin: from Ancient Greek πάθος, pathos, feeling, suffering; and -λογία, -logia, the study...

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