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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 ?
Among the remaining cases, Prenatal BoBs[TM] revealed the presence of two chromosomal abormalities: one case of trisomy 21 that could not be detected by karyotyping because of cell culture failure and was associated with advanced maternal age (42 years), a risk factor well known to increase the risk of aneuploidies, mostly trisomies, [7] and one case of microdeletion of 17p13.
Advanced maternal age was found to be associated with an increased risk of gestational diabetes mellitus.
She was followed up regularly for her obstetric examination with no other risk factors except for advanced maternal age.
3,4) Other studies have identified low parity, advanced maternal age, female circumcision, antenatal hospitalizations, twins, induction/augmentation of labor, prolonged second and third stages of labor, anesthesia, and Asian or Hispanic ethnicity as risk factors for a postpartum hemorrhage.
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.
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.
NEW YORK, July 15, 2015 /PRNewswire/ -- About Neonatal Warming Equipment Premature and congenitally ill infants are born as a result of advanced maternal age, induced fertility, labor treatments, inadequate prenatal care, and lifestyle preferences such as smoking, drinking, and obesity.
Premature and congenitally ill infants are born as a result of advanced maternal age, induced fertility, labor treatments, poor prenatal care, and lifestyle preferences such as smoking, drinking, and obesity.
Norton said in her presentation that in women over age 45, that number drops dramatically to 8%, largely because of the correlative risk for trisomy 18 and 21 and advanced maternal age.
Washington, September 7 ( ANI ): As opposed to the notion that advanced maternal age has a negative impact on the health of grown-up children, researchers have claimed that the mother's education and the number of years she survives after giving birth and spends with her offspring is what actually has an impact.

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