English dictionary of medical terms (53)
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- No:1040 - median
(L. medianus) any value that divides the probability of a random
variable in half, i.e. the probability of observing a value above
the median and the probability of observing a value below the
median are both less than or equal to one half. For a finite
population or sample, the median is the middle value of an odd
number of values (arranged in ascending order) or any value between
the two middle values of an even number of values; in the latter
case it is conventional to use the average of the two middle
- No:1041 - mediate
indirect; accomplished by the aid of an intervening medium.
- No:1042 - mediator
an object or substance by which something is mediated, such as (1)
a structure of the nervous system that transmits impulses eliciting
a specific response; (2) a chemical substance (transmitter
substance) that induces activity in an excitable tissue, such as
nerve or muscle; or (3) a substance released from cells as the
result of the interaction of antigen with antibody or by the action
of antigen with a sensitized lymphocyte.
- No:1043 - medical
pertaining to medicine or to the treatment of diseases; pertaining
to medicine as opposed to surgery.
- No:1044 - medicament
(L. medicamentum) a medicinal substance or agent.
- No:1045 - medication
(L. medicatio) impregnation with a medicine. 2. the ad-ministration
of remedies. 3. a medicament.
- No:1046 - medicinal
(L. medicinalis) 1. having healing qualities. 2. pertaining to a
medicine or to healing.
- No:1047 - medullary
(L. medullaris) pertaining to the marrow or to any medulla;
- No:1048 - megacolon
an abnormally large or dilated colon; the condition may be
congenital or acquired, acute or chronic.
- No:1049 - megaloblastic
a large abnormal red blood cell appearing in the blood in
- No:1050 - melena
(Gr. melaina, feminine of Gr. melas black) 1. the passage of dark,
pitchy, and grumous stools stained with blood pigments or with
altered blood. 2. black vomit.
- No:1051 - melanoma
(melano- + -oma) a tumour arising from the melanocytic system of
the skin and other organs. When used alone the term refers to
- No:1052 - melanosis
(melano- + -osis) a disorder caused by a disturbance in melanin
- No:1053 - membrane
a thin layer of tissue which covers a surface, lines a cavity or
divides a space or organ.
- No:1054 - menarche
(Gr. mn month + arch beginning) the establishment or beginning of
the menstrual function.
- No:1055 - meningitis
(Gr. mninx membrane + -itis) inflammation of the meninges. When
it affects the dura mater, the disease is termed pachymeningitis;
when the arachnoid and pia mater are involved, it is called
leptomeningitis, or meningitis proper.
- No:1056 - menopause
(meno- + Gr. pausis cessation) cessation of menstruation in the
human female, occurring usually around the age of 50.
- No:1057 - menorrhagia
(meno- + Gr. rhgnynai to burst forth) excessive uterine bleeding
occurring at the regular intervals of menstruation, the period of
flow being of greater than usual duration.
- No:1058 - menstruation
the cyclic, physiologic discharge through the vagina of blood and
mucosal tissues from the nonpregnant uterus; it is under hormonal
control and normally recurs, usually at approximately four-week
intervals, in the absence of pregnancy during the reproductive
period (puberty through menopause) of the female of the human and
a few species of primates. It is the culmination of the menstrual
- No:1059 - mental
(L. mens mind) pertaining to the mind; psychic. 2. (L. mentum
chin) pertaining to the chin.
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