-
actinium
0
n 1: a radioactive element of the actinide series; found in
uranium ores [syn: actinium, Ac, atomic number 89]
-
aluminium
0
n 1: a silvery ductile metallic element found primarily in
bauxite [syn: aluminum, aluminium, Al, atomic number
13]
-
ammonium
0
n 1: the ion NH4 derived from ammonia; behaves in many respects
like an alkali metal ion [syn: ammonium, ammonium ion]
-
californium
0
n 1: a radioactive transuranic element; discovered by bombarding
curium with alpha particles [syn: californium, Cf,
atomic number 98]
-
condominium
0
n 1: one of the dwelling units in a condominium [syn:
condominium, condo]
2: housing consisting of a complex of dwelling units (as an
apartment house) in which each unit is individually owned
-
cranium
0
n 1: the part of the skull that encloses the brain [syn:
cranium, braincase, brainpan]
-
decennium
0
n 1: a period of 10 years [syn: decade, decennary,
decennium]
-
delphinium
0
n 1: any plant of the genus Delphinium having palmately divided
leaves and showy spikes of variously colored spurred
flowers; some contain extremely poisonous substances
-
einsteinium
0
n 1: a radioactive transuranic element produced by bombarding
plutonium with neutrons [syn: einsteinium, Es, E,
atomic number 99]
-
euphonium
0
n 1: a bass horn (brass wind instrument) that is the tenor of
the tuba family
-
gadolinium
0
n 1: a ductile silvery-white ductile ferromagnetic trivalent
metallic element of the rare earth group [syn:
gadolinium, Gd, atomic number 64]
-
geranium
0
n 1: any of numerous plants of the family Geraniaceae
-
germanium
0
n 1: a brittle grey crystalline element that is a semiconducting
metalloid (resembling silicon) used in transistors; occurs
in germanite and argyrodite [syn: germanium, Ge,
atomic number 32]
-
hafnium
0
n 1: a grey tetravalent metallic element that resembles
zirconium chemically and is found in zirconium minerals;
used in filaments for its ready emission of electrons [syn:
hafnium, Hf, atomic number 72]
-
harmonium
0
n 1: a free-reed instrument in which air is forced through the
reeds by bellows [syn: harmonium, organ, reed organ]
-
millennium
0
n 1: a span of 1000 years [syn: millennium, millenary]
2: (New Testament) in Revelations it is foretold that those
faithful to Jesus will reign with Jesus over the earth for a
thousand years; the meaning of these words have been much
debated; some denominations (e.g. Jehovah's Witnesses) expect
it to be a thousand years of justice and peace and happiness
3: the 1000th anniversary (or the celebration of it) [syn:
millennium, millenary]
-
neptunium
0
n 1: a radioactive transuranic metallic element; found in trace
amounts in uranium ores; a by-product of the production of
plutonium [syn: neptunium, Np, atomic number 93]
-
pandemonium
0
n 1: a state of extreme confusion and disorder [syn: chaos,
pandemonium, bedlam, topsy-turvydom, topsy-
turvyness]
-
plutonium
0
n 1: a solid silvery grey radioactive transuranic element whose
atoms can be split when bombarded with neutrons; found in
minute quantities in uranium ores but is usually
synthesized in nuclear reactors; 13 isotopes are known with
the most important being plutonium 239 [syn: plutonium,
Pu, atomic number 94]
-
polonium
0
n 1: a radioactive metallic element that is similar to tellurium
and bismuth; occurs in uranium ores but can be produced by
bombarding bismuth with neutrons in a nuclear reactor [syn:
polonium, Po, atomic number 84]
-
proscenium
0
n 1: the part of a modern theater stage between the curtain and
the orchestra (i.e., in front of the curtain) [syn:
proscenium, apron, forestage]
2: the wall that separates the stage from the auditorium in a
modern theater [syn: proscenium, proscenium wall]
-
protactinium
0
n 1: a short-lived radioactive metallic element formed from
uranium and disintegrating into actinium and then into lead
[syn: protactinium, protoactinium, Pa, atomic number
91]
-
rhenium
0
n 1: a rare heavy polyvalent metallic element that resembles
manganese chemically and is used in some alloys; is
obtained as a by-product in refining molybdenum [syn:
rhenium, Re, atomic number 75]
-
ruthenium
0
n 1: a rare polyvalent metallic element of the platinum group;
it is found associated with platinum [syn: ruthenium,
Ru, atomic number 44]
-
selenium
0
n 1: a toxic nonmetallic element related to sulfur and
tellurium; occurs in several allotropic forms; a stable
grey metallike allotrope conducts electricity better in the
light than in the dark and is used in photocells; occurs in
sulfide ores (as pyrite) [syn: selenium, Se, atomic
number 34]
-
stadium
0
n 1: a large structure for open-air sports or entertainments
[syn: stadium, bowl, arena, sports stadium]
-
succedaneum
0
n 1: (medicine) something that can be used as a substitute
(especially any medicine that may be taken in place of
another)
-
titanium
0
n 1: a light strong grey lustrous corrosion-resistant metallic
element used in strong lightweight alloys (as for airplane
parts); the main sources are rutile and ilmenite [syn:
titanium, Ti, atomic number 22]
-
uranium
0
n 1: a heavy toxic silvery-white radioactive metallic element;
occurs in many isotopes; used for nuclear fuels and nuclear
weapons [syn: uranium, U, atomic number 92]
-
zirconium
0
n 1: a lustrous grey strong metallic element resembling
titanium; it is used in nuclear reactors as a neutron
absorber; it occurs in baddeleyite but is obtained chiefly
from zircon [syn: zirconium, Zr, atomic number 40]
-
endocranium
0
n 1: membrane lining the inside of the skull
-
herculaneum
0
n 1: ancient city; now destroyed
-
minium
0
n 1: a reddish oxide of lead (Pb3O4) used as a pigment in paints
and in glass and ceramics [syn: red lead, minium]
-
meconium
0
n 1: thick dark green mucoid material that is the first feces of
a newborn child
-
syconium
0
n 1: the fleshy multiple fruit of the fig consisting of an
enlarged hollow receptacle containing numerous fruitlets
-
archegonium
0
n 1: a female sex organ occurring in mosses, ferns, and most
gymnosperms
-
pelargonium
0
n 1: geraniums native chiefly to South Africa; widely cultivated
[syn: Pelargonium, genus Pelargonium]
-
asplenium
0
n 1: in some classification systems placed in family
Polypodiaceae [syn: Asplenium, genus Asplenium]
-
helenium
0
n 1: genus of American herbs with flowers having yellow rays:
sneezeweeds [syn: Helenium, genus Helenium]
-
hymenium
0
n 1: spore-bearing layer of cells in certain fungi containing
asci or basidia
-
quadrennium
0
n 1: a period of four years
-
quinquennium
0
n 1: a period of five years
-
diem
0
-
calcaneum
0
-
iconium
0
-
stramonium
0
-
cuprammonium
0
-
positronium
0
-
spermogonium
0