| developmental biology | <study> The study of how a multicellular organism develops from its early immature forms (zygote, larva, embryo, etc.) into an adult. (09 Oct 1997) |
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| developmental brain tumours | <radiology> 1% of all brain tumours, germ-cell tumours, epidermoid more than dermoid more than > Teratoma, usually midline, craniopharyngioma, colloid cyst, lipoma, hamartoma (12 Dec 1998) |
| developmental delay | Behind schedule in reaching milestones of early childhood development. (12 Dec 1998) |
| developmental disabilities | Disorders in which there is a delay in development based on that expected for a given age level or stage of development. These impairments or disabilities originate before age 18, may be expected to continue indefinitely, and constitute a substantial impairment. Biological and nonbiological factors are involved in these disorders. (12 Dec 1998) |
| developmental disability | Loss of function brought on by prenatal and postnatal events in which the predominant disturbance is in the acquisition of cognitive, language, motor, or social skills; e.g., mental retardation, autistic disorder, learning disorder, and attention-deficit hyperactivity disorder. (05 Mar 2000) |
| developmental grooves | Fine lines found in the enamel of a tooth that mark the junction of the lobes of the crown in its development. Synonym: developmental lines. (05 Mar 2000) |
| developmental lines | Fine lines found in the enamel of a tooth that mark the junction of the lobes of the crown in its development. Synonym: developmental lines. (05 Mar 2000) |
| developmental milestones | <paediatrics> (1-3 years) In ascending order: masters walking, recognises gender differences, uses up to 8 words and understands simple commands, able to run, pivot and walk backwards, uses spoon to feed self, can name pictures of common objects, can point to body parts, imitates speech of others, begins pedaling tricycle, learns to take turns in play with other children, able to feed self neatly with minimal spill, able to say first and last name, able to draw a line when shown, dresses self with minimal help, learns to share toys without parent direction (12-18 years) In ascending order: boys exhibit secondary sexual characteristics (chest, facial, axillary and pubic hair growth voice changes, penile enlargement), movement into adult height/weight category, cognitive abilities move from simply concrete to abstract, peer acceptance and recognition is vital (3-6 years) In ascending order: rides tricycle well, able to draw a circle, able to draw stick figures, hops on one foot, catches a bounced ball, understands size concepts, enjoys rhymes and word play, able to skip, increased independence in performing tasks without parental assistance, begins to ride bicycle, understands time concepts, begins to recognise written words, starts reading skills, starts school (6-12 years) In ascending order: understands and is able to follow sequential directions, beginning skills for team sports, begins to lose baby teeth and erupt permanent teeth, reading skills develop further, peer recognition becomes important, girls begin to demonstrate secondary sexual characteristics (pubic hair, axillary hair, breast development), first menstrual period may occur (birth-1 year) In ascending order: displays social smile, rolls over by self, able to sit alone without support, babbling, plays peek-a-boo, eruption of first tooth, pulls self to standing position, walks while holding on to furniture or other support, says mama or dada in proper situations, able to drink from cup, understands NO and will stop activity in response, walks without support (27 Sep 1997) |
| developmental psychology | The study of the psychological, physiological, and behavioural changes in an organism that occur from birth to old age. (05 Mar 2000) |
| Deventer | Hendrik van, Dutch obstetrician, 1651-1724. See: Deventer's pelvis. (05 Mar 2000) |
| Deventer's pelvis | A pelvis with shortened anteroposterior diameter. (05 Mar 2000) |
| deviance | 1. The act of deviating; a wandering from the way; variation from the common way, from an established rule, etc.; departure, as from the right course or the path of duty. 2. The state or result of having deviated; a transgression; an act of sin; an error; an offense. 2. The voluntary and unnecessary departure of a ship from, or delay in, the regular and usual course of the specific voyage insured, thus releasing the underwriters from their responsibility. <physics> Deviation of a falling body, that deviation from a strictly vertical line of descent which occurs in a body falling freely, in consequence of the rotation of the earth. Deviation of the compass, the angle which the needle of a ship's compass makes with the magnetic meridian by reason of the magnetism of the iron parts of the ship. Deviation of the line of the vertical, the difference between the actual direction of a plumb line and the direction it would have if the earth were a perfect ellipsoid and homogeneous, caused by the attraction of a mountain, or irregularities in the earth's density. Origin: LL. Deviatio: cf. F. Deviation. Source: Websters Dictionary (01 Mar 1998) |
| deviant | 1. Denoting or indicative of deviation. 2. An individual exhibiting deviation, especially sexual. (05 Mar 2000) |
| deviation | 1. The act of deviating; a wandering from the way; variation from the common way, from an established rule, etc.; departure, as from the right course or the path of duty. 2. The state or result of having deviated; a transgression; an act of sin; an error; an offense. 2. The voluntary and unnecessary departure of a ship from, or delay in, the regular and usual course of the specific voyage insured, thus releasing the underwriters from their responsibility. <physics> Deviation of a falling body, that deviation from a strictly vertical line of descent which occurs in a body falling freely, in consequence of the rotation of the earth. Deviation of the compass, the angle which the needle of a ship's compass makes with the magnetic meridian by reason of the magnetism of the iron parts of the ship. Deviation of the line of the vertical, the difference between the actual direction of a plumb line and the direction it would have if the earth were a perfect ellipsoid and homogeneous, caused by the attraction of a mountain, or irregularities in the earth's density. Origin: LL. Deviatio: cf. F. Deviation. Source: Websters Dictionary (01 Mar 1998) |
| deviation to the left | A marked increase in the percentage of immature cells in the circulating blood, based on the premise in haematology that the bone marrow with its immature myeloid cells is on the left, while the circulating blood with its mature neutrophils is on the right. Synonym: deviation to the left. See: maturation index. (05 Mar 2000) |