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The Collaborative International Dictionary

Histology \His*tol"o*gy\, n. [Gr. "isto`s tissue + -logy.] That branch of biological science, which treats of the minute (microscopic) structure of animal and vegetable tissues; -- called also histiology.

Douglas Harper's Etymology Dictionary

"study of organic tissues," 1847, from histo- + -ology.


n. (context biology English) The study of the microscopic structure, chemical composition and function of the tissue or tissue systems of plants and animals.


n. the branch of biology that studies the microscopic structure of animal or plant tissues


Histology is the study of the microscopic anatomy (microanatomy) of cells and tissues of plants and animals. It is commonly performed by examining cells and tissues under a light microscope or electron microscope, the specimen having been sectioned (cut into a thin cross section with a microtome), stained, and mounted on a microscope slide. Histological studies may be conducted using tissue culture, where live human or animal cells are isolated and maintained in an artificial environment for various research projects. The ability to visualize or differentially identify microscopic structures is frequently enhanced through the use of histological stains. Histology is an essential tool of biology and medicine.

Histopathology, the microscopic study of diseased tissue, is an important tool in anatomical pathology, since accurate diagnosis of cancer and other diseases usually requires histopathological examination of samples. Trained physicians, frequently licensed pathologists, are the personnel who perform histopathological examination and provide diagnostic information based on their observations. The trained personnel who prepare histological specimens for examination are histotechnicians, histology technicians (HT), histology technologists (HTL), medical scientists, medical laboratory technicians, or biomedical scientists. Their field of study is called histotechnology.

Usage examples of "histology".

One of the most interesting problems is to find the ganglionic origin of the great nerves of the medulla oblongata, and this is the end to which, by the aid of the most delicate sections, colored so as to bring out their details, mounted so as to be imperishable, magnified by the best instruments, and now self-recorded in the light of the truth-telling sunbeam, our fellow-student is making a steady progress in a labor which I think bids fair to rank with the most valuable contributions to histology that we have had from this side of the Atlantic.

Reading on in the article, Marissa noted that the diagnosis had been made by the histology of fallopian tube biopsy alone since no organisms had been seen or cultured.

Holger Hyden, professor of Histology at Goteborg, revealed that Tricayandamino-propene, a substance made by manipulating the molecular structure of a series of chemicals, can change brain's nerve cells and cells of membrane that sheath the cells.