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a. a period of history marked by some feature or characteristic; era
b. (capital when part of a name): the Middle Ages; the Space Age
2. Geology palaeontol
a. a period of the earth's history distinguished by special characteristics
b. the period during which a stage of rock strata is formed; a subdivision of an epoch
3. Myth any of the successive periods in the legendary history of man, which were, according to Hesiod, the golden, silver, bronze, heroic, and iron ages
4. Psychol the level in years that a person has reached in any area of development, such as mental or emotional, compared with the normal level for his chronological age
5. of age adult and legally responsible for one's actions (usually at 18 or, formerly, 21 years)



in humans, a stage of development that is characterized by specific regularities of formation of the organism and personality and by relatively stable morphophysiological and psychological traits. While age is a stage in the biological maturing of the organism, a process controlled by genetic factors, it is also a concrete result and stage of the social-psychological development of the personality and is determined by the conditions of life, training, and upbringing.

The content and form of training and upbringing are historically composed and varied according to age; in their turn they affect the determination of the boundaries and possibilities of a given age. In contemporary pedagogy and developmental psychology, several ages are differentiated with respect to the known relationships of the boundaries: infancy (from birth to one year); pre-preschool, or early childhood (from one to three); preschool (from three to seven); early school age (from seven to ten years); juvenile, or middle school (from ten to 15); and late school, or early youth (15 to 18 years old). Beyond these limits there is no generally accepted classification in the literature; only old age is considered separately. With the increased longevity noted in the 20th century, gerontology and gerontopsychology have arisen as disciplines to study the problems of prolonging the active life of a human being. Each age has a characteristic structure of cognitive, emotional, and volitional properties and qualities; forms of behavior; types of relationships to the environment; and peculiarities of structure and functioning of various organs and systems of the organism. This structure, however, is not invariable: in the 20th century a general acceleration of the physical and mental development of children has been noted. On the other hand, educational theory, in solving the problem of optimizing training, widens the possibilities of age and the boundaries of acquiring knowledge. Training must take into account not only the level of development achieved but also the development perspectives (the concept of “zones of imminent development,” as formulated by L. S. Vygotskii): the teacher must know not only what is present in a child of a given age but also what can be achieved, given certain conditions, by the child in the near future.



Period of time from origin or birth to a later time designated or understood; length of existence.
Any one of the named epochs in the history of the earth marked by specific phases of physical conditions or organic evolution, such as the Age of Mammals.
One of the smaller subdivisions of the epoch as geologic time, corresponding to the stage or the formation, such as the Lockport Age in the Niagara Epoch.


(aerospace engineering)
References in periodicals archive ?
We found that advanced maternal age is associated with an increased risk of hypertensive disorder of pregnancy.
Greatest among them are scarring of endometrial cavity with previous caesarean section, uterine curettage, myomectomy, Asherman's syndrome, iatrogenic uterine perforation and advanced maternal age.
The group of patients referred for routine screening (routine ultrasound) of the group of patients referred with other indications such as ah abnormal maternal serum screen, advanced maternal age (age [greater than or equal to] 35 years old at time of delivery), maternal drug use or exposure, and a family history of congenital anomalies.
Her pregnancy was also complicated by placenta previa and gestational diabetes--two conditions that she was at increased risk of developing because of advanced maternal age (13).
In addition, they often use less safe and effective methods of contraception, which may result in unplanned and unwanted pregnancies (55), often at a very young or an advanced maternal age, and in very short or very (unintendedly) long birth-to-conception intervals.
The scientific uncertainty over ultrasound led the Food and Drug Administration to advise against sonograms during pregnancy unless there is a problem such as bleeding, a family history of birth defects, or some other medical reason for the procedure, including advanced maternal age.
Age, Smoking, & Baby's Weight While the dangers of smoking during pregnancy have been well documented, the combined risk of smoking and advanced maternal age are less clear.
Different studies have shown that PGS, as it is currently practiced, does not improve live birth rates in patients of advanced maternal age, with recurrent implantation failure or repeated pregnancy loss and may even be harmful.
2] Although, aetiology of Abruptio placentae is not fully understood it is generally multifactorial, that is impaired placentation, uteroplacental underperfusion, hypertensive disorder in pregnancy, non vertex presentation, polyhydramnios, IUGR, advanced maternal age, maternal trauma, cigarette smoking, alcohol consumption, PROM, retroplacental fibromyoma are associated with Abruptio placentae.
14 Genetic anomalies such as chromosomal abnormality, advanced maternal age and history of recent losses as well as infections to mother, ectopic pregnancy are known to play critical role.
HELSINKI -- A freeze-all strategy in women of advanced maternal age who are undergoing in vitro fertilization appears to increase the likelihood of pregnancy, according to findings from two retrospective cohort studies.
These included advanced maternal age (more than 38 years), more than two IVF failures, more than two miscarriages, prior pregnancy or child which was chromosomally abnormal and low sperm count.

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