Xiphias gladius
1: large toothless marine food fish with a long swordlike upper jaw; not completely cold-blooded i.e. they are able to warm their brains and eyes: worldwide in warm waters but feed on cold ocean floor...
Xiphiidae
1: comprising the common swordfishes [syn: {family Xiphiidae}]
xiphium iris
1: bulbous iris of western Mediterranean region having usually violet-purple flowers [syn: {Spanish iris}, {Iris xiphium}]
xiphoid process
1: smallest of the three parts of the breastbone; articulates with the corpus sternum and the seventh rib
Xiphosura
1: horseshoe crabs and extinct forms [syn: {order Xiphosura}]
Xiphosurus polyphemus
1: large marine arthropod of the Atlantic coast of North America having a domed carapace that is shaped like a horseshoe and a stiff pointed tail; a living fossil related to the wood louse [syn: {hors...
xiv
1: being one more than thirteen [syn: {fourteen}, {14}] n : the cardinal number that is the sum of thirteen and one [syn: {fourteen}, {14}]
xix
1: being one more than eighteen [syn: {nineteen}, {19}] n : the cardinal number that is the sum of eighteen and one [syn: {nineteen}, {19}]
Xizang
1: an Asian country under the control of China; located in the Himalayas [syn: {Tibet}, {Thibet}, {Sitsang}]
xl
1: being ten more than thirty [syn: {forty}, {40}, {twoscore}] n : the cardinal number that is the product of ten and four [syn: {forty}, {40}]
xli
1: being one more than forty [syn: {forty-one}, {41}]
xlii
1: being two more than forty [syn: {forty-two}, {42}]
xliii
1: being three more than forty [syn: {forty-three}, {43}]
xliv
1: being four more than forty [syn: {forty-four}, {44}]
xlv
1: being five more than forty [syn: {forty-five}, {45}]
xlvi
1: being six more than forty [syn: {forty-six}, {46}]
xlvii
1: being seven more than forty [syn: {forty-seven}, {47}]
xlviii
1: being eight more than forty [syn: {forty-eight}, {48}]
Xmas
1: a Christian holiday celebrating the birth of Christ; a quarter day in England, Wales, and Ireland [syn: {Christmas}, {Christmas Day}, {Dec 25}]
XOR circuit
1: gate for exclusive OR; a circuit in a computer that fires only if only one of its inputs fire [syn: {X-OR circuit}, {XOR gate}]
XOR gate
1: gate for exclusive OR; a circuit in a computer that fires only if only one of its inputs fire [syn: {X-OR circuit}, {XOR circuit}]
XT
1: the presence of an unwanted signal via an accidental coupling [syn: {crosstalk}]
XTC
1: street names for methylenedioxymethamphetamine [syn: {Adam}, {ecstasy}, {go}, {disco biscuit}, {cristal}, {X}, {hug drug}]
xv
1: being one more than fourteen [syn: {fifteen}, {15}] n : the cardinal number that is the sum of fourteen and one [syn: {fifteen}, {15}]
xvi
1: being one more than fifteen [syn: {sixteen}, {16}] n : the cardinal number that is the sum of fifteen and one [syn: {sixteen}, {16}]
xvii
1: being one more than sixteen [syn: {seventeen}, {17}] n : the cardinal number that is the sum of sixteen and one [syn: {seventeen}, {17}]
xviii
1: being one more than seventeen [syn: {eighteen}, {18}] n : the cardinal number that is the sum of seventeen and one [syn: {eighteen}, {18}]
xx
1: denoting a quantity consisting of 20 items or units [syn: {twenty}, {20}] n 1: the cardinal number that is the sum of nineteen and one [syn: {twenty}, {20}] 2: (genetics) normal complement of sex c...
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xxi
1: being one more than twenty [syn: {twenty-one}, {21}] n : the cardinal number that is the sum of twenty and one [syn: {twenty-one}, {21}]
xxii
1: being two more than twenty [syn: {twenty-two}, {22}] n : the cardinal number that is the sum of twenty-one and one [syn: {twenty-two}, {22}]
xxiii
1: being three more than twenty [syn: {twenty-three}, {23}] n : the cardinal number that is the sum of twenty-two and one [syn: {twenty-three}, {23}]
xxiv
1: being four more than twenty [syn: {twenty-four}, {24}] n : the cardinal number that is the sum of twenty-three and one [syn: {twenty-four}, {24}, {two dozen}]
xxix
1: being nine more than twenty [syn: {twenty-nine}, {29}] n : the cardinal number that is the sum of twenty-eight and one [syn: {twenty-nine}, {29}]
xxv
1: being five more than twenty [syn: {twenty-five}, {25}] n : the cardinal number that is the sum of twenty-four and one [syn: {twenty-five}, {25}]
xxvi
1: being six more than twenty [syn: {twenty-six}, {26}] n : the cardinal number that is the sum of twenty-five and one [syn: {twenty-six}, {26}]
xxvii
1: being seven more than twenty [syn: {twenty-seven}, {27}] n : the cardinal number that is the sum of twenty-six and one [syn: {twenty-seven}, {27}]
xxviii
1: being eight more than twenty [syn: {twenty-eight}, {28}] n : the cardinal number that is the sum of twenty-seven and one [syn: {twenty-eight}, {28}]
xxx
1: being ten more than twenty [syn: {thirty}, {30}] n 1: the cardinal number that is the product of ten and three [syn: {thirty}, {30}] 2: (genetics) abnormal complement of three X chromosomes in a fe...
xxxi
1: being one more than thirty [syn: {thirty-one}, {31}]
xxxii
1: being two more than thirty [syn: {thirty-two}, {32}]
xxxiii
1: being three more than thirty [syn: {thirty-three}, {33}]
xxxiv
1: being four more than thirty [syn: {thirty-four}, {34}]
xxxv
1: being five more than thirty [syn: {thirty-five}, {35}]
xxxvi
1: being six more than thirty [syn: {thirty-six}, {36}]
xxxvii
1: being severn more than thirty [syn: {thirty-seven}, {37}]
xxxviii
1: being eight more than thirty [syn: {thirty-eight}, {38}]
XXY
1: (genetics) abnormal complement of sex hormones in a male resulting in Klinefelter's syndrome
XXY-syndrome
1: syndrome in males that is characterized by small testes and long legs and enlarged breasts and reduced sperm production and mental retardation; a genetic defect in which an extra X chromosome (XXY)...
XY
1: (genetics) normal complement of sex hormones in a male
Xylaria
1: type genus of Xylariaceae; fungi with perithecia in the upper part of erect black woody stromata [syn: {genus Xylaria}]
Xylaria mali
1: fungus causing black root rot in apples [syn: {black root rot fungus}]
Xylaria polymorpha
1: the fruiting bodies of the fungi of the genus Xylaria [syn: {dead-man's-fingers}, {dead-men's-fingers}]
Xylariaceae
1: family of fungi characterized by dark brown to back spores [syn: {family Xylariaceae}]
xylem
1: the woody part of plants: the supporting and water-conducting tissue, consisting primarily of tracheids and vessels
xylene
1: a colorless flammable volatile liquid hydrocarbon used as a solvent [syn: {xylol}]
Xylocaine
1: a local anesthetic (trade names Lidocaine and Xylocaine) used topically on the skin and mucous membranes [syn: {lidocaine}]
Xylocopa
1: carpenter bees [syn: {genus Xylocopa}]
xylol
1: a colorless flammable volatile liquid hydrocarbon used as a solvent [syn: {xylene}]
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