screwback
Frequency: Zipf frequency 0.00 in modern English
Meaning
noun
The period of screw rotation during injection molding when the plastic can flow into the mold.
Uncountable
noun
A hook-shapped attachment for an earring that sits behind the earlobe and tightens with a screw. Also, an earring that uses this type of attachment.
Uncountable
noun
A mechanism for attaching a small item to clothing that operates by a post which goes through the cloth and a small backing plate that screws to the post. Also, the medal, tie pin, button, etc. that uses this type of attachment.
Uncountable
noun
A type of case for a pocket watch where the mechanism is accessed by a removable back plate that screws onto the back of the case. Also, a watch that has such a case.
Uncountable
noun
A half-volley executed by holding the racket loosely and swinging it straight at the ball.
Uncountable
noun
A masonry abutment on an arch that is wedge-shaped in order to transmit the thrust downward.
Uncountable
Example Sentences
- "Two main phenomena have been emphasized: (a) The transient nature of plastication during periods of screw rotation ("screwback") in comparison with the similar process in continuous extrusion. (b) The significant amount of melting produced by thermal conduction from the barrel while the screw is not turning."
- "But in the open (screwback) position, the plastic must progress through a series of labyrinths which produces a more turbulent flow."
- "Screwback time is a limiting factor when the plastication rate of the machine is too small or if the cooling time is small, as is the case with thin-walled mouldings."
- "The clip was a variation of the screwback; today, many persons who cannot wear pierced earrings choose clips as an option."
- "The quality of these buttons and charms is best rolled gold and hard enameled in correct colors, the button having either a screwback or a jewelers' catchpin."
- "The medal screwpost is placed through the uniform and retained by a circular screwback plate."