16-letter words containing p, a, c, k, n
- anode dark space — the dark region between the anode glow and the anode in a vacuum tube, occurring when the pressure is low.
- aston dark space — the dark region between the cathode and the cathode glow in a vacuum tube, occurring when the pressure is low.
- back-propagation — (Or "backpropagation") A learning algorithm for modifying a feed-forward neural network which minimises a continuous "error function" or "objective function." Back-propagation is a "gradient descent" method of training in that it uses gradient information to modify the network weights to decrease the value of the error function on subsequent tests of the inputs. Other gradient-based methods from numerical analysis can be used to train networks more efficiently. Back-propagation makes use of a mathematical trick when the network is simulated on a digital computer, yielding in just two traversals of the network (once forward, and once back) both the difference between the desired and actual output, and the derivatives of this difference with respect to the connection weights.
- background paper — a report or other piece of writing that is intended to provide contextual and historical information that will help people understand a particular topic or situation
- bacterioplankton — (biology) The bacterial component of marine plankton.
- bankruptcy court — a section of the United States federal court which specializes in the handling of bankruptcy cases
- bankruptcy order — a court order appointing a receiver to manage the property of a debtor or bankrupt
- black propaganda — propaganda that does not come from the source it claims to come from
- blink comparator — an optical instrument used to detect small differences in two photographs of the same field or object by viewing them alternately, switching rapidly from one to the other.
- capacity booking — a time when someone has booked the whole of a venue or the maximum amount of something available
- carpatho-ukraine — a region in W Ukraine: ceded by Czechoslovakia in 1945.
- champagne bucket — A champagne bucket is a container that holds ice cubes or cold water and ice. You can use it to put bottles of champagne in and keep the champagne cool.
- chernobyl packet — (networking) /cher-noh'b*l pak'*t/ A network packet that induces a broadcast storm and/or network meltdown, named in memory of the April 1986 nuclear accident at Chernobyl in Ukraine. The typical scenario involves an IP Ethernet datagram that passes through a gateway with both source and destination Ethernet address and IP address set as the respective broadcast addresses for the subnetworks being gated between. Compare Christmas tree packet.
- commonplace book — a notebook in which quotations, poems, remarks, etc, that catch the owner's attention are entered
- cooperative bank — a cooperative savings institution, chartered and regulated by a state or the federal government, that receives deposits in exchange for shares of ownership and invests its funds chiefly in loans secured by first mortgages on homes.
- educational park — a group of elementary and high schools, usually clustered in a parklike setting and having certain facilities shared by all grades, that often accommodates students from a large area.
- formation packer — A formation packer is a substance that is used as a seal between the casing and the borehole so that part of the hole can be tested.
- hard-packed snow — snow which becomes very firmly packed as it becomes refrozen due to cold weather conditions rather than melting
- information pack — a set of leaflets giving information about something
- inter-packet gap — (networking) A time delay between successive data packets mandated by the network standard for protocol reasons. In Ethernet, the medium has to be "silent" (i.e., no data transfer) for a few microseconds before a node can consider the network idle and start to transmit. This is necessary for fairness reasons. The delay time, which approximately equals the signal propagation time on the cable, allows the "silence" to reach the far end so that all nodes consider the net idle.
- keep one's place — a particular portion of space, whether of definite or indefinite extent.
- knapsack problem — the problem of determining which numbers from a given collection of numbers have been added together to yield a specific sum: used in cryptography to encipher (and sometimes decipher) messages.
- knock for a loop — a portion of a cord, ribbon, etc., folded or doubled upon itself so as to leave an opening between the parts.
- know one's place — a particular portion of space, whether of definite or indefinite extent.
- lipstick lesbian — a lesbian who is feminine in manner or appearance; a femme.
- magnetic pick-up — a type of record player pick-up in which the stylus moves an iron core in a coil, causing a changing magnetic field that produces the current
- make a complaint — If a guest makes a complaint, they express their dissatisfaction with something.
- packet switching — a method of efficient data transmission whereby the initial message is broken into relatively small units, or packets, that are routed independently and subsequently reassembled.
- packet-switching — a method of efficient data transmission whereby the initial message is broken into relatively small units, or packets, that are routed independently and subsequently reassembled.
- packing fraction — Physics. a measure of the stability of an atomic nucleus, equal to 10 4 multiplied by the mass defect and divided by the mass number.
- pain in the neck — source of annoyance
- pharmacokinetics — the branch of pharmacology that studies the fate of pharmacological substances in the body, as their absorption, distribution, metabolism, and elimination.
- pork scratchings — small pieces of crisply cooked pork crackling, eaten cold as an appetizer with drinks
- punctuation mark — any of a group of conventional marks or characters used in punctuation, as the period, comma, semicolon, question mark, or dash.
- put a sock in it — be quiet!
- sheepskin jacket — a short jacket made of the skin of a sheep with the wool still attached to it
- slap on the back — to congratulate
- smack one's lips — If you smack your lips, you open and close your mouth noisily, especially before or after eating, to show that you are eager to eat or enjoyed eating.
- spanish mackerel — an American game fish, Scomberomorus maculatus, inhabiting the Atlantic Ocean.
- sticking plaster — an adhesive cloth or other material for covering and closing superficial wounds, holding bandages in place, etc.
- take one's place — to take up one's usual or specified position
- the long paddock — a stockroute or roadside area offering feed to sheep and cattle in dry times
- trucking company — a company that transports goods by lorry
- upside-down cake — a cake that is baked on a layer of fruit, then turned before serving so that the fruit is on top.
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