doughnut

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doughnut

(esp US), donut
anything shaped like a ring, such as the reaction vessel of a thermonuclear reactor

doughnut

[′dō‚nət]
(nucleonics)
Also spelled donut.
The toroidal vacuum chamber in which electrons are accelerated in a betatron or synchrotron. Also known as toroid.
An assembly of enriched fissionable material, often doughnut-shaped, used in a thermal reactor to provide a local increase in fast neutron flux for experimental purposes.
(petroleum engineering)
A ring of wedges or a threaded, tapered ring that supports a pipe string.

concrete collar, doughnut

A collar of reinforced concrete which is placed around an existing column so that it can be jacked up; the shrinkage of the concrete causes it to grip the column firmly.
References in periodicals archive ?
She said: "I thought it would be the perfect combination, as jam doughnuts and ice cream are my favourite desserts.
whether it's money, a handful of grain, or a half-eaten jam doughnut.
A 60g (2oz) jam doughnut has 250 calories while a round of tuna and cucumber sandwiches made with two slices of wholemeal bread is 240 calories.
But when you're stuffing your face with a jam doughnut, how useful would it be to ensure all your sugar's dissolved at the touch of a button?
Experts have classified any woman with a waist measuring over 35ins as medically obese289 This is the number of calories in a single jam doughnut.
I can, for example, go from Monday to Friday without a drop of alcohol; I've got the strength to resist the minxes who thrust a jam doughnut under my nose on Fridays and say: 'Go on, have one
Products made by Nestle and Boots were found to contain more sugar than a jam tart and a jam doughnut, and Farley's rusks more than chocolate digestives.
A day without some kind of celebration, even if it's just a three o'clock jam doughnut and a bitch about Carol Thatcher, is a day wasted.
I said, with three-quarters of a Tescos' jam doughnut melting in mine, ``Why are you a fat man?
And each time a jam doughnut calls to me through a baker's window as I walk through the town, I will hopefully picture the beach, the sea and the dress - and resist.
THE cost of a jam doughnut at Forest East Services near Leicester really takes the biscuit at 99p.
And 22 of those aimed specifically at kids have more sugar per suggested serving than a jam doughnut.