tropho-, troph-, -trophy, -trophs, -trophically, -trophic, -trophous

Congenital defect of copper metabolism manifested in short, sparse, poorly pigmented kinky hair; kinky hair disease: The condition of trichopoliodystrophy is associated with failure to thrive in life, physical and mental retardation, and progressive severe deterioration of the brain; apparently a defect of copper transport.

An abnormality of the hair shaft in which the fine, brittle hairs show alternating light and dark zones when viewed under a polarizing microscope: Mike read about trichothiodystrophy in which the sulfur content of the hair is greatly reduced and mental retardation has frequently been a related feature.

Trichothiodystrophy is descriptive of the congenital fragile hair with multiple fractures resulting from low sulfur-containing amino acid, "cysteine", content of the hair, mental impairment, and short stature.

Nutrition of the hair: In class, Judy learned about trichotrophy which related to the nutrition of a person's hair supplied with nutritive substances that influence its structure.

Regarding the exchange of food, like from glands, between social insects: The behavior of trophallactic nutrition concerns the glandular fluid which is common among ants, bees, and termites within a colony.

The exchange of food substances among members of a colony of social insects: Trophallaxis is exceptionally developed in ants, bees, wasps,and termites, as well as some vampire bats and wolves.

Relating to or dependent upon nutrition: In medical school, Sam learned about trophic disorders concerning a person's nutrition, digestion, assimilation, and the growth. .

A part of a cell or of part of the nervous system that is essential for the nutrition, growth and maintenance of an organism: The trophic center is any part of the central nervous system whose proper functioning is thought to be necessary for the nutrition, growth, or maintenance of a peripheral part of the body; such as, the parietal lobe for the development of the muscles of an extremity.

Outdated, a trophic influence or condition: Trophicity pertains to the conditions of nutrition and metabolism of tissues or organs often in relationship to the nervous system of these functions.

Any particular form of nutrition concerning the tissue of another organism: Jeff read about trophism in his medical book that pertained to to different kinds of nutrition in combination with the tissues o other organisms.

A participant in a trophobiotic relationship: A trophobiont provides the food in the situation of a symbiotic association for the other organism.

Symbiosis in organisms in which food is obtained from one species (the trophobiont) by another in return for protection: In his zoology book, Harry learned about trophobiosis of insects in which one supplied the food for the other one in exchange for safety and security. .

The cell layer that forms the outer wall of the blastocyst. The trophoblast supplies the embryo with nutrients and aids with implanting the embryo in the uterine wall.

In mammals, a layer of tissue formed by cells forming the outer covering of the blastocyst. After implanation of the blastocyst, this layer is no longer cellular. At the 5th-5th day of human pregnancy, the blastocyst attaches to the luteinized endometrium and differentiates on its surface a syncytium which helps to penetrate the epithelium and then break through into the maternal mucous membrane (implanation).

As early as implanation (about the 8th-9th day), the trophoblast starts to establish a fetal-maternal exchange of gases and nutriments. When the blastocyst has completely penetrated into the maternal mucosa, the trophoblast consists of an external syncytial layer around the blastocyst, the syncytiotrophoblast, and an internal cellular layer, the cytotrophoblast.

Pertaining to a trophoblast: Judy found out from her gynecologist that the trophoblastic membrane of cells created the wall of a blastocyst in the very beginning of pregnancy.

A cell that supplies nourishment to other cells: A trophocyte can be exemplified by the fat body of an insect that has such a nutritional function.

The trophectoderm, or trophoblast, together with the vascular mesodermal layer underlying it: The trophoderm includes the growing, active part of the trophoblast in the placental region.