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John Langdon H., English physician, 1828-1896. See: Down syndrome.


1. Fine, soft, fluffy feathers forming the first plumage of a young bird and underlying the contour feathers in certain adult birds.
2. A soft, silky, or feathery substance, such as the first growth of a human beard.


Etymology: AS, adune, off hill
(of a computer) not operating as a result of malfunction or maintenance or for other reasons.


the soft, small feathers lacking BARBULES that cover the body of a bird and aid heat retention.

Patient discussion about down

Q. Can Down syndrome occur again? A few years ago, at the age of 32 my sister gave birth to a child that was diagnosed with Down syndrome. Now, at the age of 37 she's pregnant again. Can she have another baby with Down? Does the fact she has a baby with Down means she has higher risk for a second baby with Down?

A. - Older women especially after 35 years
- Previuosly child with Down Syndrome

Video link


Q. assessment of down syndrom

A. down syndrome is a very easy diagnosis - it just need a chromosome check and seeing 3 (instead 2) chromosomes number 21. -

Q. what does enlarged heart mean? is it linked to down syndrome? My wife is 16 weeks pregnant. we did a prenatal US and we were told that the baby hes an enlarged heart and that we are advised to do amniocentesis. A friend of mine had a baby with down syndrome, and he was toled that if they have done this procedure, the doctors could have find it on time and abort the pregnancy. Is there a clear connection between the enlarged hart and the fact that the doctor advised us to do this procedure to down syndrome?

A. Down syndrome is associated with several kinds of heart problems. those problems can cause an enlarged heart but usually it will appears as a post-natal complication.
The protocol that most obstetrics use is that if there is anything abnormal in the US there is an automatic referral to an amniocentesis procedure.
the US has a lot of false alarms, so they must check with the more accurate procedure.

More discussions about down
References in periodicals archive ?
However, downhill racing can be even harder on bikes than on riders.
To be specific, downhill racing is big in Europe and Australia.
bootylicious; sexually attractive, especially with curvaceous buttocks; street luge; downhill racing feet first on large skateboard; noisenik; a rock musician who performs loud harsh music
said Monday it has developed a mountain bike for downhill racing that it plans to enter in competition this year to develop its technical expertise and enhance the bike's performance.
When it comes to downhill racing, friction also slows Olson's speed.
Since almost nothing was known about the champions of ski jumping or downhill racing, let alone the masters of hurling or the luge, Roone created an introductory segment that he called "up close and personal.
The bike is designed for downhill racing with an eight-inch travel suspension on the front and back forks so riders can stay in the saddle despite hitting boulders and trees roots at speeds of 45mph.
Becca likes the fast pace of track sprints and mountain-bike downhill racing.
In-Line Skating Big Air Downhill Racing Best Radical Street Street Cross Race
The gravity-propelled bullets are built for downhill racing and can reach incredible speeds up to 70 mph.