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Pencil

pencil

1. A small, fine brush of hair or bristles used by painters for laying on colours. With subtile pencil depainted was this storie. (Chaucer)

2. A slender cylinder or strip of black lead, coloured chalk, slate etc, or such a cylinder or strip inserted in a small wooden rod intended to be pointed, or in a case, which forms a handle, used for drawing or writing. See graphite.

3. Hence, figuratively, an artist's ability or peculiar manner; also, in general, the act or occupation of the artist, descriptive writer, etc.

4. (Science: optics) An aggregate or collection of rays of light, especially when diverging from, or converging to, a point.

5. (Science: geometry) A number of lines that intersect in one point, the point of intersection being called the pencil point.

6. (Science: medicine) A small medicated bougie. Pencil case, a holder for pencil lead.

(Science: botany) Pencil flower, an American perennial leguminous herb (Stylosanthes elatior). Pencil lead, a slender rod of black lead, or the like, adapted for insertion in a holder.

Origin: OF. Pincel, F. Pinceau, L. Penicillum, penicillus, equiv. To peniculus, dim. Of penis a tail. Cf. Penicil.


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How to maintain sterility while preparing petri dishes

When talking about bacterial colonies something around the size of half the pencil eraser is already fairly large. A small colony would be the size of a pin-prick or similar. Well, difficult to say without further details, but it could be that you have some Bacilli ...

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by biohazard
Fri Jun 28, 2013 10:04 am
 
Forum: Microbiology
Topic: How to maintain sterility while preparing petri dishes
Replies: 8
Views: 4413

How to maintain sterility while preparing petri dishes

... contaminating colonies were nearly identical; they were small, though. Probably the size of...I don't know; probably had half the diameter of a pencil eraser. Yes, whitish. Some of the colonies were rounded while others were not.

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by animus
Thu Jun 27, 2013 12:18 pm
 
Forum: Microbiology
Topic: How to maintain sterility while preparing petri dishes
Replies: 8
Views: 4413

Re: Sound and how the brain reacts to it

... experienced the same thing my whole life. The sounds of folding paper, library books with plastic covers opening and closing, the scratching of a pencil across paper, they all put me in a trance-like state that you all have been describing. When I hear these noises I become extremely happy and ...

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by kgreener
Tue May 21, 2013 7:02 pm
 
Forum: Human Biology
Topic: Sound and how the brain reacts to it
Replies: 89
Views: 142332

Sound and how the brain reacts to it

... put props away, etc... The sound of her feet gently shuffling across the floor is absolutely pleasurable in the same way as paper rustling. - Pencil cases, make up cases, etc...(Yup, me too!) I went to Art School and never noticed if sketching or painting had an affect. That might be because ...

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by Soundstrue
Fri Dec 14, 2012 4:22 pm
 
Forum: Human Biology
Topic: Sound and how the brain reacts to it
Replies: 89
Views: 142332

Sound and how the brain reacts to it

I thought I was the only defect lol...pencil cases and papers send me into a hypnotic state. potato chip bags and whispers wow what the hell causes this?

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by emptyshadows
Fri Jun 22, 2012 9:52 pm
 
Forum: Human Biology
Topic: Sound and how the brain reacts to it
Replies: 89
Views: 142332
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