Category: H
-
Hibernoma
A rare multilobular encapsulated tumor that contains fetal fat tissue closely resembling the fat stored in the foot pads of hibernating animals.
-
Hiatus semilunaris
The groove in the external wall of the middle meatus of the nasal fossa into which the frontal sinus, maxillary sinus, and anterior ethmoid sinuses drain. The opening may be blocked in patients with acute or chronic sinusitis.
-
Hiatus maxillaris
The opening of the maxillary sinus into the nasal cavity, located on the nasal surface of the maxillary bone.
-
Hiatus esophageus
The opening in the diaphragm through which the esophagus passes.
-
Hiatus canalis facialis
A hiatus of the canal for the greater petrosal nerve.
-
Hiatus aorticus
An opening in the diaphragm through which pass the aorta and the thoracic duct.
-
Hexosephosphate
A phosphoric acid ester of glucose; one of several esters formed in the muscles and other tissues in the metabolism of carbohydrates.
-
Hexokinase
An enzyme in cells that in the presence of ATP catalyzes the conversion of glucose to glucose-6-phosphate, the first step in glycolysis.
-
Hexavitamin
A standardized vitamin preparation containing vitamins A, D, C, and B, riboflavin, and niacinamide.
-
Hexavalent
Having a chemical valence of six.