QFET
Acronym of quantum field effect transistor.
Entries starting with Q
25 entries.
QPQ
nounMetalworking
Initialism of quench polish quench (“a treatment process for hardening steel, i.e. enhancing its corrosion resistance”).
QR
nounManufacturing
Initialism of quick response.
quadragesimo-octavo
A book size, (2.5"-3.1" x 2.5"-3.3"), corresponding to the paper size.
quadripole
An electrical circuit that has two pairs of external terminals.
quality of service
The overall performance of a telephony or computer network, based on error rates, throughput, transmission delay, etc.
quantity
Property of a phenomenon, body, or substance, where the property has a magnitude that can be expressed as number and a reference.
quarry car
A car that operates on rails laid in a quarry, usually for carrying rock or waste.
quartersaw
verbWoodworking
Cut radially (towards the heart of the log), at right angles to the growth rings, for stability or the production of decorative patterns.
quartz crystal
A small crystal of quartz accurately cut in certain directions so that it can be vibrated at a particular frequency, to produce an electric signal of constant known frequency.
quectogram
An SI unit of mass equal to 10⁻³⁰ grams. Symbol: qg
quectosecond
An SI unit of time equal to 10⁻³⁰ seconds. Symbol: qs
queen excluder
A selective barrier inside a beehive that allows workers past, but not the larger queens and drones.
queen post
nounConstruction
A supporting post designed to span longer openings than a king post.
queen-cage
A small case used to introduce and protect a new queen bee to a queenless hive in order to determine whether the new queen will be accepted or rejected
quench
verbMetallurgy
To cool rapidly by direct contact with liquid coolant, as a blacksmith quenching hot iron.
quenching
nounMetallurgy
The rapid cooling of a hot metal object, by placing it in a liquid, in order to harden it.
quettagram
An SI unit of mass equal to 10³⁰ grams. Symbol: Qg
quettametre
An SI unit of length equal to 10³⁰ metres. Symbol: Qm
quettasecond
An SI unit of time equal to 10³⁰ seconds. Symbol: Qs. (= sextillions of years, a hypothetical time span that is meaningless except in speculative contexts such as theoretical physics, philosophy, religion, and humorous hyperbole)
quickshifter
nounAutomotive
A device that eliminates the need to use the clutch or throttle when shifting gears on a manual transmission.
quill
A quill drive, having a hollow shaft with another movable shaft inside it.
quilting needle
A specialized sewing needle designed for quilting, consisting of a short length, fine diameter, a sharp or slightly rounded tapered point, and a small round eye to enable even stitches.
quint
A vehicle used by firefighters that combines the capabilities of a fire engine and a fire truck, having the ability to provide vertical access as well as pump water to fight a fire.
quoin
A metal wedge which fits into the space between the type and the edge of a chase, and is tightened to fix the metal type in place.