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4 definitions found
From The Collaborative International Dictionary of English v.0.48 :
Nova \No"va\ (n[=o]"v[.a]), n.; pl. L. Novae (n[=o]"v[=e]), E.
Novas (n[=o]"v[.a]z). [L., fem. sing. of novus new.]
A star which suddenly increases in brightness thousands of
times, then fades back to near its original intensity. It may
appear as a "new" star if its original brightness was too low
for routine observation. A star which suddenly increases in
brightness to many millions of times its original intensity
is a supernova, and the postulated mechanisms for the
increases of brightness of novae and supernovae are
Note: The most important modern novae are:
No"va Co*ro"nae Bo`re*a"lis;
No"va Per"se*i. There are two novae called Nova
Persei. They are:
(a) A small nova which appeared in 1881.
(b) An extraordinary nova which appeared in Perseus in 1901.
It was first sighted on February 22, and for one night
(February 23) was the brightest star in the sky. By July
it had almost disappeared, after which faint surrounding
nebulous masses were discovered, apparently moving
radially outward from the star at incredible velocity.
[Webster 1913 Suppl. +PJC]
From WordNet (r) 3.0 (2006) :
n 1: a star that ejects some of its material in the form of a
cloud and become more luminous in the process
From Moby Thesaurus II by Grady Ward, 1.0 :
40 Moby Thesaurus words for "nova":
Beehive, Cepheid variable, Hertzsprung-Russell diagram, Hyades,
Messier catalog, NGC, Pleiades, Seven Sisters, absolute magnitude,
binary star, black hole, double star, dwarf star, fixed star,
giant star, globular cluster, gravity star, magnitude,
main sequence star, mass-luminosity law, neutron star,
open cluster, populations, pulsar, quasar,
quasi-stellar radio source, radio star, red giant star,
relative magnitude, sky atlas, spectrum-luminosity diagram, star,
star catalog, star chart, star cloud, star cluster,
stellar magnitude, supernova, variable star, white dwarf star
From The Free On-line Dictionary of Computing (30 December 2018) :
A minicomputer(?) introduced by Data General
in 1969, with four 16-bit accumulators, AC0 to AC3, and a
15-bit program counter. A later model also had a 15-bit
stack pointer and frame pointer. AC2 and AC3 could be
used for indexed addressing and AC3 was used to store the
return address on a subroutine call. Apart from the small
register set, the NOVA was an ordinary CPU design.
Memory could be accessed indirectly through addresses stored
in other memory locations. If locations 0 to 3 were used for
this purpose, they were auto-incremented after being used. If
locations 4 to 7 were used, they were auto-decremented.
Memory could be addressed in 16-bit words up to a maximum of
32K words (64K bytes). The instruction cycle time was 500
nanoseconds(?). The Nova originally used core memory,
then later dynamic RAM.
Like the PDP-8, the Data General Nova was also copied, not
just in one, but two implementations - the Data General
MN601 and Fairchild 9440. Luckily, the NOVA was a more
mature design than the PDP-8.
Another CPU, the PACE, was based on the NOVA design, but
featured 16-bit addresses (instead of the Nova's 15), more
addressing modes, and a 10-level stack (like the Intel
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