Dictionary » S » Scum



1. The extraneous matter or impurities which rise to the surface of liquids in boiling or fermentation, or which form on the surface by other means; also, the scoria of metals in a molten state; dross. Some to remove the scum it did rise. (Spenser)

2. Refuse; recrement; anything vile or worthless. The great and innocent are insulted by the scum and refuse of the people. (Addison)

Origin: Of Scand. Origin; cf. Dan. & Sw. Skum, Icel. Skm, LG. Schum, D. Schuim, OHG. Scm, G. Schaum; probably from a root meaning, to cover. Cf. Hide skin, Meerschaum, Skim, Sky.

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Re: Is water itself biology?

... we've observed, but pure water itself is not alive. The study of pure water falls under chemistry, not biology. Of course, once you have pond scum all that changes and it's biology all the way down.

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by jonmoulton
Fri Mar 01, 2013 4:57 pm
Forum: General Discussion
Topic: Is water itself biology?
Replies: 5
Views: 2727

Re: Theories - Origin of Life

... life evolved over a billion years, it began to produce oxygen, but not enough for the life-energizing gas to appear in the atmosphere. Was green scum all there was to life, all there ever would be? Apparently, yes, unless life and nonlife could somehow work together to oxygenate the planet from ...

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by scottie
Wed Sep 28, 2011 2:35 pm
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 563
Views: 1129082

Re: Is Spirulina really good for our health ?

... not in what has a nutrient content that appears high, but in how likely is it to be a food for humans. Think about Spirulina. It is pond scum essentially. I mean that in the most reverent way possible of course, for it serves an important function. It is the liver and the kidneys of fresh ...

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by vapaatyyli
Tue Apr 12, 2011 9:08 pm
Forum: Microbiology
Topic: Is Spirulina really good for our health ?
Replies: 38
Views: 161262

Unknown Bacteria. Halps!

*Main Interest: My interpretations.. When I think its cleared.. is it? etc, Incubated at 37*C, on Brain-Heart Agar. Original Vial has scum at the top, and some sediment at the bottom. Img= http://weyrcat.com/med/09nov_unknown_7004a.png . Also: Blue chip (piece of lid.) Was told ...

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by weyrcat
Tue Nov 24, 2009 9:33 pm
Forum: Microbiology
Topic: Unknown Bacteria. Halps!
Replies: 0
Views: 2792

Re: WHO scum - politics over lives

Hopefully that was directed at enviros in general, not me specifically? While I've definitely made some environmentalist arguments in this forum, I don't think I've "posted any flags" in this particular discussion, merely defended a point of view. No that was not directed at you. I was ju...

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by MichaelXY
Wed Jun 17, 2009 6:31 am
Forum: Ecology
Topic: WHO scum - politics over lives
Replies: 18
Views: 24023
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