Hypothalamus
The Hypothalamus is a portion of the brain that contains a number of small nuclei with a variety of functions

Hypothecated tax
The hypothecation of a tax is the dedication of the revenue from a specific tax for a particular expenditure purpose. Hypothecation is the pledging of assets.

Hypothermia
Hypothermia is a condition in which core temperature drops below the required temperature for normal metabolism and body functions which is defined as . Body temperature is usually maintained near a constant level of through biologic homeostasis or thermoregulation

Hypothesis
A hypothesis is a proposed explanation for a phenomenon. The term derives from the Greek, ὑποτιθέναι – hypotithenai meaning "to put under" or "to suppose". For a hypothesis to be put forward as a scientific hypothesis, the scientific method requires that one can test it

Hypothetical (album)
Hypothetical is the fifth studio album by British progressive metal band Threshold. The album was released on March 20, 2001

Hypothyroidism
Hypothyroidism is a condition in which the thyroid gland does not make enough thyroid hormone.Iodine deficiency is the most common cause of hypothyroidism worldwide but it can be caused by other causes such as several conditions of the thyroid gland or, less commonly, the pituitary gland or hypothalamus

Hypotrichosis
Hypotrichosis is a condition of abnormal hair patterns - predominantly loss or reduction. It occurs, most frequently, by the growth of vellus hair in areas of the body that normally produce terminal hair. Typically, the individual's hair growth is normal after birth, but shortly thereafter the hair is shed and replaced with sparse, abnormal hair growth

Hypoxia
Hypoxia may refer to:* Hypoxia , reduced dissolved oxygen content of a body of water detrimental to aerobic organisms* Hypoxia , a pathological condition in which the body as a whole or region of the body is deprived of adequate oxygen supply-Popular culture:* "Hypoxia" , a 2008 ambient song* "Hypoxia" , a 1994 electronica

Hyrax
A hyrax is any of four species of fairly small, thickset, herbivorous mammals in the order Hyracoidea. The rock hyrax Procavia capensis, the yellow-spotted rock hyrax Heterohyrax brucei, the western tree hyrax Dendrohyrax dorsalis, and the southern tree hyrax, Dendrohyrax arboreus live in Africa and the Middle East.Hyraxes are

Hysterectomy
A hysterectomy is the surgical removal of the uterus, usually performed by a gynecologist. Hysterectomy may be total or partial

Hysteresis
Hysteresis is the dependence of a system not just on its current environment but also on its past. This dependence arises because the system can be in more than one internal state. To predict its future evolution, either its internal state or its history must be known. If a given input alternately increases and decreases, the output tends to form a loop as in Fig. 1

Hysteria
Hysteria, in its colloquial use, describes unmanageable emotional excesses. People who are "hysterical" often lose self-control due to an overwhelming fear that may be caused by multiple events in one's past that involved some sort of severe conflict; the fear can be centered on a body part, or, most commonly, on an imagined problem with that body part

Hysteria (Def Leppard song)
"Hysteria" is a song by British hard rock band Def Leppard. It served as the titular third single from their 1987 multi-platinum album of the same name. "Hysteria" peaked at #10 on the Billboard Hot 100

Hysteria (play)
Hysteria: Or Fragments of an Analysis of an Obsessional Neurosis is a two-hour play by Terry Johnson fictionalising a 1938 meeting between Salvador Dalí and Sigmund Freud a year before the latter's death. It is named after the Freudian psychological term "hysteria" and its London premiere was in 1 August 1993

HZ
Hz is the International Standard symbol for Hertz, the unit of frequencyHZ may also stand for:* Habitable zone, the distance from a star where a planet can maintain Earth-like life* Hamilton Zoo, in New Zealand