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Medical Dictionary - Dictionary of Medicine and Human Biology


Medical Dictionary


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z


zosteriform (zos-ter′i-form)
SYN: zosteroid.

zosteroid (zos′ter-oyd)
Resembling herpes zoster. SYN: zosteriform. [zoster + G. eidos, resemblance]

zoxazolamine (zok-sa-zo′la-men)
A centrally acting skeletal muscle relaxant that is no longer used because of its hepatic toxicity.

Z-plasty
Technique to elongate a contracted scar or to rotate tension 90°; the middle line of a Z-shaped incision is made along the line of greatest tension or contraction, and triangular flaps are raised on opposite sides of the two ends and transposed.

Zr
Symbol for zirconium.

Zsigmondy
Richard A., Austro-German chemist and Nobel laureate, 1865–1929. See Z. test, brownian-Z. movement.

ZSR
Abbreviation for zeta sedimentation ratio.

Zuckerkandl
Emil, Austrian anatomist, 1849–1910. See Z. bodies, under body, Z. convolution, Z. fascia, organs of Z., under organ.

zusammen (Z) (zu-sam′men)
1. SYN: cis- (4) . 2. A form of geometric isomerism with regard to carbon-carbon double bonds in which all four moieties attached to the carbons are different. If the substituents with the higher ranking (based on established rules) are on the same side of the double bond, Z is used. See entgegen. [Ger. together]

zwieback (zwi′bak)
Sweetened bread that has been baked twice, preferred for infant feeding during teething. [Ger. twice-baked]

Zwischenferment (tsvish′en-fer-ment′)
SYN: glucose-6-phosphate dehydrogenase. [Ger. zwischen, between, + Ferment, fermentation]

zwittergents (tsvit′er-jents)
Detergents that are zwitterionic; often used as surfactants and in the release of proteins from biomembranes. SYN: zwitterionic detergent. [zwitterion + detergent]

zwitterionic (tsvit′er-i-on′ik)
Denoting a substance with the properties of a zwitterion; e.g., at pH value of 6.11, alanine is z..

zwitterions (tsvit′er-i-onz)
SYN: dipolar ions, under ion. SEE ALSO: zwitter hypothesis. [Ger. Zwitter, hermaphrodite, mongrel + ion]

zyg-
See zygo-.

zygal (zi′gal)
Relating to or shaped like a zygon or yoke; H-shaped.

zygapophysial, zygapophyseal (zi′ga-po-fiz′e-al, zi-ga-pof′i-se′al)
Relating to a zygapophysis or articular process of a vertebra.

zygapophysis, pl .zygapophyses (zi′ga-pof′i-sis, -sez)
SYN: articular process, articular process. [G. zygon, yoke, + apophysis, offshoot] z. inferior [TA] SYN: inferior articular process. z. superior [TA] SYN: superior articular process.

zygion (zig′e-on)
In cephalometrics and craniometrics, the most lateral point of the zygomatic arch. [G. a later form of zygon, yoke]

zygo-, zyg-
A yoke, a joining. [G. zygon, yoke, zygosis, a joining]

zygoma (zi-go′ma)
1. SYN: zygomatic bone. 2. SYN: zygomatic arch. [G. a bar, bolt, the os jugale, fr. zygon, yoke]

zygomatic (zi′go-mat′ik)
Relating to the z. bone.

zygomatico-
Zygomatic; relating usually to the zygomatic bone. See zygo-. [G. zygoma]

zygomaticoauricular (zi′go-mat′i-ko-aw-rik′u-lar)
Relating to the zygomatic bone and the auricle.

zygomaticoauricularis (zi′go-mat′i-ko-aw-rik′u-lar′is)
SYN: auricularis anterior (muscle).

zygomaticofacial (zi′go-mat′i-ko-fa′shal)
Relating to the zygomatic bone and the face.

zygomaticofrontal (zi′go-mat′i-ko-fron′tal)
Relating to the zygomatic and frontal bones.

zygomaticomaxillary (zi′go-mat′i-ko-mak′si-lar-e)
Relating to the zygomatic bone and the maxilla.

zygomatico-orbital (zi′go-mat′i-ko-or′bi-tal)
Relating to the zygomatic bone and the orbit.

zygomaticosphenoid (zi′go-mat′i-ko-sfe′noyd)
Relating to the zygomatic and sphenoid bones.

zygomaticotemporal (zi′go-mat′i-ko-tem′po-ral)
Relating to the zygomatic and temporal bones.

zygomaxillare (zi′go-mak-si-la′re)
A craniometric point located externally at the lowest extent of the zygomaticomaxillary suture. SYN: key ridge, zygomaxillary point.

zygomaxillary (zi-go-mak′si-lar-e)
Relating to the zygomatic bone and the maxilla.

Zygomycetes (zi′go-mi-se′tez)
A class of fungi characterized by sexual reproduction resulting in the formation of a zygospore, and asexual reproduction by means of nonmotile spores called sporangiospores or conidia. SYN: Phycomycetes. [zygo- + G. mykes (myket-), fungus]

zygomycosis (zi′go-mi-ko′sis)
A broad term that includes mucormycosis and entamophthoramycosis; usually applied when culture is not available and the clinical entity is unclear. SYN: phycomycetosis, phycomycosis.

zygon (zi′gon)
The short crossbar connecting the branches of a zygal fissure. [G. crossbar, yoke]

zygonema (zi-g-o-ne′ma)
SYN: zygotene. [zygo- + G. nema, thread]

zygopodium (zi-go-po′de-um)
The distal intermediate segment of the limb skeleton, i.e., radius and ulna, tibia and fibula. [zygo- + G. podion, small foot]

zygosis (zi-go′sis)
True conjugation or sexual union of two unicellular organisms, consisting essentially in the fusion of the nuclei of the two cells. [G. a joining]

zygosity (zi-gos′i-te)
The nature of the zygotes from which individuals are derived; e.g., whether by separation of the division of one zygote (monozygotic), in which case they will be genetically identical, or from two separate fertilized ova (dizygotic).

zygosperm (zi′go-sperm)
SYN: zygospore. [zygo- + G. sperma, seed]

zygospore (zi′go-spor)
Among the Phycomycetes, a thick-walled sexual spore arising from fusion of two morphologically identical structures, generally hyphal tips, bearing nuclei of opposite mating types (gametangia). SYN: zygosperm.

zygosyndactyly (zi-go-sin-dak′til-e)
Complete or incomplete webbing of the fingers or toes. [zygo- + syndactyly]

zygote (zi′got)
1. The diploid cell resulting from union of a sperm and an ovum. Cf.:conceptus. 2. The individual that develops from a fertilized ovum. [G. zygotos, yoked]

zygotene (zi′go-ten)
The stage of prophase in meiosis in which precise point for point pairing of homologous chromosomes begins. SYN: zygonema. [zygo- + G. tainia (L. taenia), band]

zygotic (zi-got′ik)
Pertaining to a zygote, or to zygosis.

zygotoblast (zi-go′to-blast)
SYN: sporozoite. [G. zygotos, yoked, + blastos, germ]

zygotomere (zi-go′to-mer)
SYN: sporoblast. [G. zygotos, yoked, + meros, part]

zym-
See zymo-.

zymase (zi′mas)
1. Obsolete term for a mixture of enzymes. 2. Specifically, the intracellular enzymes of yeast that promotes alcoholic fermentation.

zymo-, zym-
Fermentation, enzymes. [G. zyme, leaven]

zymodeme (zi′mo-dem)
An isoenzyme pattern, as identified by isoenzyme electrophoresis. [zymo- + G. demos, populace]

zymogen (zi′mo-jen)
SYN: proenzyme.

zymogenesis (zi-mo-jen′e-sis)
Transformation of a proenzyme (zymogen) into an active enzyme. [zymo- + G. genesis, production]

zymogenic (zi-mo-jen′ik)
1. Relating to a zymogen or to zymogenesis. SYN: zymogenous. 2. Causing fermentation.

zymogenous (zi-moj′e-nus)
SYN: zymogenic (1) .

zymogram (zi′mo-gram)
Strips of paper, gels, etc., in which the locations of enzymes, separated electrophoretically or by other means, are demonstrated by histochemical methods. [zymo- + G. gramma, something written]

zymosan (zi′mo-san)
A carbohydrate (glucose polymer) obtained from the walls of yeast cells that interferes with complement.

zymoscope (zi′mo-skop)
An instrument measuring CO2 evolved and, therefore, the fermenting power of yeast. [zymo- + G. skopeo, to view]

zymosterol (zi-mos′ter-ol)
An intermediate in the biosynthesis of cholesterol from lanosterol.

zyxin (ziks′in)
A cytoplasmic protein found in a number of distinct types of adherens junctions; it may play a role in the organization of membrane-cytoskeletal attachments.

ZZ
See ZZ genotype.




A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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