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Possible definitions for hys

cyst
Enclosed sac within body tissues. It has a distinct membrane and generally contains liquid. Most cysts are benign, but several kinds may be malignant or precancerous. Benign cysts often press on nearby organs and require removal. Formed by overproduction of epithelium (surface tissue of anatomical structures), cysts may become detached from surrounding structures and move freely. They can contain natural secretions, abnormal breakdown products, or, in infections, bacteria, larval parasites, and microbial products. Some organs, incl. the kidney, liver, and breast, can become filled with cysts as a result of cystic diseases that may be dangerous or may hide more serious diseases. See also tumor.


His
Swiss cardiologist. His father, Wilhelm His (1831-1904), first realized that each nerve fiber stems from a single neuron, and invented the microtome, a device used to slice thin tissue sections for microscopic examination. The younger His discovered (1893) the specialized muscle fibers (bundle of His) running along the septum between the heart's left and right chambers. He found that they help communicate a single rhythm of contraction to all parts of the heart, and he was one of the first to recognize that the heartbeat originates in individual cells of heart muscle.


Hus
Bohemian religious reformer. He studied and taught at the Univ. of Prague, where he was influenced by J. Wycliffe. As rector of the university from 1402, he became leader of a reform movement that criticized the corruption of the Roman Catholic clergy. The movement was threatened when Wycliffe's teachings were condemned by the church, and Hus's position was further undermined by his stand in the power struggles among rival popes. He was excommunicated in 1411, but continued to preach. Renewed sale of indulgences by the antipope John XXIII earned Hus's criticism, which in turn led to a revival of the case of heresy against him. He was invited to the Council of Constance to explain his views; though promised safe conduct, he was arrested, tried for heresy, and burned at the stake. His writings were important in the development of the Czech language as well as in the theology of church reform, and his followers were called Hussites.


hymn
Song used in Christian worship, usually sung by the congregation and written in stanzas with rhyme and meter. The term comes from the Greek hymnos ("song of praise"), but songs in honor of God or the gods exist in all civilizations. Christian hymnody grew out of the singing of psalms in the Temple of Jerusalem. The earliest known Christian hymn dates from c.AD 200. Hymns were prominent in the Byzantine liturgy from early times, and in the Western church they were sung by congregations until the Middle Ages, when choirs took over hymn singing. Congregational singing was reestablished during the Reformation. M. Luther and his followers were great hymn writers, while the ...

Top words beginning with H: holostome, hirta, hesperetin, hyperbolize, hygroton, hypercathexis, hematologist, heckerism, hermite, highclass, haploid, hominies, hepatising, hypersensitized, hecuba, heartburning, hyperstrophic, homewreckers, hankow, herculanean

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