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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
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Downy's family of liquid fabric softener includes: Ultra Downy, Downy with Febreze[R] Fresh Scent, Downy Pure Essentials[TM], Downy Experientials[TM], Downy Unstopables[TM]and Downy Simple Pleasures[R].
So when Downy approached me to kick off this feisty, larger-than-life scavenger hunt to prove Unstopables's fresh scents can stand out even in Las Vegas, I was like, 'I do laundry, I like playing games and I definitely can't say no to Vegas,' okay sign me up
Despite its friendly sounding name evocative of baby ducklings, downy mildew is not a pretty disease.
Matt Purcell--a collaborating entomologist and leader of the Australian Biocontrol Laboratory in Brisbane--and I set out to look for Old World climbing fern and downy rose myrtle sites in parks and along roadsides.
Since potassium phosphonate -- the treatment previously used by organic winegrowers to fight downy mildew -- was classified as an agricultural chemical in 2013, organic winegrowers are reduced to fighting the fungus with a copper preparation.
Models for quantifying the damage caused by downy mildew can be obtained by quantifying severity of the disease and correlating it with yield.
The company said MBI-110 is a broad spectrum product and is notable for its activity on downy mildews and white molds, as shown in two years of field trials in the US, Canada and Europe.
One soggy owlet, still in downy white feathers, sat amid the wet ruins of his nest.
downy mildew (caused by Peronospora trifoliorum) resistance was evaluated on 100 accessions originating from distinct countries across the world.
Justin Jaworski, assistant professor in Lehigh University's Department of Mechanical Engineering and Mechanics, said that owls possess no fewer than three distinct physical attributes that are thought to contribute to their silent flight capability: a comb of stiff feathers along the leading edge of the wing; a flexible fringe a the trailing edge of the wing; and a soft, downy material distributed on the top of the wing.