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hiring hall an employment office or center, esp. one where a union places applicants in positions according to their seniority as union members, or by the principle of rotation.
Hiroshima a city in southwest Honshu, Japan, on which the United States dropped an atomic bomb in August, 1945--the first use of a nuclear weapon in history. Hiroshima has been rebuilt and is a thriving city.
hirsute covered with hair or stiff hairs; hairy or shaggy.
his that thing or those things belonging to that male person or animal previously mentioned. [2 definitions]
Hispanic Spanish. [3 definitions]
Hispaniola a West Indies island shared by Haiti in the western part and the Dominican Republic in the eastern part.
hispid having a covering of bristlelike hairs, or stiff tiny projections, as the stems of some plants or certain animal parts.
hiss to produce a sound by pushing air past teeth held close together, as if prolonging an "s." [4 definitions]
hist used to command attention or silence.
histamine an organic crystalline compound, produced esp. during an allergic reaction, that lowers blood pressure, dilates blood vessels, and increases stomach secretions. (Cf. antihistamine.) [2 definitions]
histidine an aromatic amino acid, essential in humans and other animals, that is found in proteins.
histo- tissue.
histochemistry the study of the chemical makeup of tissues and cells.
histocompatibility a condition allowing the cells or tissues of one person to be accepted by another, as in a blood transfusion or organ transplant.
histogen cells that are the origin of new tissue, such as cambium in plant stems and roots.
histogram a bar graph of a frequency distribution in which the frequency of a variable is represented by the height of the bar, and the class interval by the width, where each class interval is a summary of data that represents a range of independent variable values rather than a single value.
histology the scientific study of the microscopic structure of organic tissue. [2 definitions]
histolysis the breakdown and decomposition of organic tissue.
histone any of a group of simple proteins that are found in the nuclei of cells and are involved in the formation of chromatin.
histoplasmosis a mild infection or severe disease caused by a fungus taken into the body, sometimes attacking various organs or the nervous system.
historian one who writes about or is an expert on history.