Dictionary » S » Screws



1. To turn, as a screw; to apply a screw to; to press, fasten, or make firm, by means of a screw or screws; as, to screw a lock on a door; to screw a press.

2. To force; to squeeze; to press, as by screws. But screw your courage to the sticking place, And we'll not fail. (Shak)

3. Hence: To practice extortion upon; to oppress by unreasonable or extortionate exactions. Our country landlords, by unmeasureable screwing and racking their tenants, have already reduced the miserable people to a worse condition than the peasants in France. (swift)

4. To twist; to distort; as, to screw his visage. He screwed his face into a hardened smile. (Dryden)

5. To examine rigidly, as a student; to subject to a severe examination. To screw out, to press out; to extort. To screw up, to force; to bring by violent pressure. To screw in, to force in by turning or twisting.

Origin: Screwed; Screwing.

1. A cylinder, or a cylindrical perforation, having a continuous rib, called the thread, winding round it spirally at a constant inclination, so as to leave a continuous spiral groove, between one turn and the next, used chiefly for producing, when revolved, motion or pressure in the direction of its axis, by the sliding of the threads of the cylinder in the grooves between the threads of the perforation adapted to it, the former being distinguished as the external, or male screw, or, more usually the screw; the latter as the internal, or female screw, or, more usually, the nut.

The screw, as a mechanical]] power, is a modification of the inclined plane, and may be regarded as a right-angled triangle wrapped round a cylinder, the hypotenuse of the marking the spiral thread of the screw, its base equaling the circumference of the cylinder, and its height the pitch of the thread.

2. Specifically, a kind of nail with a spiral thread and a head with a nick to receive the end of the screw-driver. Screws are much used to hold together pieces of wood or to fasten something; called also wood screws, and screw nails. See also Screw bolt, below.

3. Anything shaped or acting like a screw; especially, a form of wheel for propelling steam vessels. It is placed at the stern, and furnished with blades having helicoidal surfaces to act against the water in the manner of a screw. See Screw propeller, below.

4. A steam vesel propelled by a screw instead of wheels; a screw steamer; a propeller.

5. An extortioner; a sharp bargainer; a skinflint; a niggard.

6. An instructor who examines with great or unnecessary severity; also, a searching or strict examination of a student by an instructor.

7. A small packet of tobacco.

8. An unsound or worn-out horse, useful as a hack, and commonly of good appearance.

9. (Science: mathematics) A straight line in space with which a definite linear magnitude termed the pitch is associated (cf. 5th Pitch, 10). It is used to express the displacement of a rigid body, which may always be made to consist of a rotation about an axis combined with a translation parallel to that axis.

10. (Science: zoology) An amphipod crustacean; as, the skeleton screw (Caprel 1000 la). See sand screw, under Sand. Archimedes screw, compound screw, foot screw, etc. See Archimedes, Compound, Foot, etc. A screw loose, something out of order, so that work is not done smoothly; as, there is a screw loose somewhere. Endless, or perpetual screw, a screw used to give motion to a toothed wheel by the action of its threads between the teeth of the wheel; called also a worm. Lag screw. See Lag. Micrometer screw, a screw with fine threads, used for the measurement of very small spaces. Right and left screw, a screw having threads upon the opposite ends which wind in opposite directions. Screw alley. See shaft alley. Screw bean.

(Science: botany) The larva of an American fly (Compsomyia macellaria), allied to the blowflies, which sometimes deposits its eggs in the nostrils, or about wounds, in man and other animals, with fatal results. Screw wrench. A wrench for turning a screw. A wrench with an adjustable jaw that is moved by a screw. To put the screw, or screws, on, to use pressure upon, as for the purpose of extortion; to coerce. To put under the screw or screws, to subject to presure; to force. Wood screw, a metal screw with a sharp thread of coarse pitch, adapted to holding fast in wood.

Origin: OE. Scrue, OF. Escroue, escroe, female screw, F. Ecrou, L. Scrobis a ditch, trench, in LL, the hole made by swine in rooting; cf. D. Schroef a screw, G. Schraube, Icel. Skrfa.

Please contribute to this project, if you have more information about this term feel free to edit this page

Results from our forum

Looking for answers/input.

... to produced more baby organisms may be a temporary thing. As long as it works now, that's all that matters. Then the environment changes and screws everything up. That mutation that used to help may now be a liability, or it may prove to be useful in some way different than before. Evolution ...

See entire post
by wbla3335
Thu Mar 12, 2009 3:36 pm
Forum: Evolution
Topic: Looking for answers/input.
Replies: 9
Views: 8659

Bible vs Darwin

At last, there shall be peace in the evo forum, if not on Earth! Let's see how long it lasts before some fanatic comes and screws it all up. ;)

See entire post
by alextemplet
Mon Dec 22, 2008 6:59 pm
Forum: Evolution
Topic: Bible vs Darwin
Replies: 293
Views: 322929

i LOVE Microscopes

... appear bad, even if it is actually very good for waht it is designed. Screwdriver are very bad at putting nails, but hammer are crap to drive screws...

See entire post
by canalon
Fri Oct 17, 2008 5:42 pm
Forum: Cell Biology
Topic: i LOVE Microscopes
Replies: 3
Views: 2231

Nucleic acid structures

There's two types of helices(think screws). One is left handed and one is right. Also, compare DNA vs RNA.

See entire post
by mith
Fri Dec 21, 2007 9:10 pm
Forum: Genetics
Topic: Nucleic acid structures
Replies: 1
Views: 1524

the importance of shape and size in biological molecules

... with that. Go with examples, enzyme substrate, antibody, antigen. Talk about why it is important, because for example, if antibody recognition screws up, you might get immune deficiency or autoimmune. Enzyme recognition problems you get a bunch diseases, or you get cancer if a kinase phosphorylates ...

See entire post
by david23
Mon May 07, 2007 12:00 pm
Forum: Cell Biology
Topic: the importance of shape and size in biological molecules
Replies: 3
Views: 5072
View all matching forum results

This page was last modified 21:16, 3 October 2005. This page has been accessed 1,300 times. 
What links here | Related changes | Permanent link