| yerba | <botany> An herb; a plant. This word is much used in compound names of plants in Spanish; as, yerba buena [Sp, a good herb], a name applied in Spain to several kinds of mint (Mentha sativa, viridis, etc), but in California universally applied to a common, sweet-scented labiate plant (Micromeria Douglasii). Yerba dol osa. [Sp, herb of the she-bear] A kind of buckthorn (Rhamnus Californica). Yerba mansa. [Sp, a mild herb, soft herb] A plant (Anemopsis Californica) with a pungent, aromatic rootstock, used medicinally by the Mexicans and the Indians. Yerba reuma. [Cf. Sp. Reuma rheum, rheumatism] A low California undershrub (Frankenia grandifolia). Origin: Sp. Source: Websters Dictionary (01 Mar 1998) |
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| yerba santa | Synonym: eriodictyon. Origin: Sp. Sacred herb (05 Mar 2000) |
| Yersinia | <bacteria> Genus of gram-negative bacteria of the Enterobacteriaceae, all are parasites or pathogens. Yersinia pestis (formerly Pasteurella pestis) was the cause of the Black Death plague. (18 Nov 1997) |
| yersinia enterocolitica | <radiology> Gram (-) rod, most common infection of small bowel, superficial, self-limited, TI is preferred site, three stages: nodular, edematous, resolution (each 2 weeks) Differential diagnosis: Peyer's patches, Crohn disease (12 Dec 1998) |
| Yersinia frederiksenii | Reclassified from Y. Enterocolitica; rare cause of enterocolitis in humans. (05 Mar 2000) |
| yersinia infections | Infections with bacteria of the genus yersinia. (12 Dec 1998) |
| Yersinia intermedia | Reclassified from Y. Enterocolitica; rare cause of enterocolitis in humans. (05 Mar 2000) |
| Yersinia kristensenii | Reclassified from Y. Enterocolitica; pathogenicity uncertain. (05 Mar 2000) |
| yersinia pestis | The bacterial cause of the bubonic plague which in the year 541 (as the black death) and later in the middle ages decimated europe. The effects of the plague are described in the nursery rhyme we all fall down. It is transmitted to humans by the bite of fleas that have fed on infected animals, mostly rodents. Plague occurs in the u.s. It is treatable with antibiotics but, if not treated promptly, can promptly lead to death. (12 Dec 1998) |
| yersinia pseudotuberculosis | A human and animal pathogen causing mesenteric lymphadenitis, diarrhoea, and bacteraemia. (12 Dec 1998) |
| yersinia pseudotuberculosis infections | Infections with bacteria of the species yersinia pseudotuberculosis. (12 Dec 1998) |
| Yersinina pestis | <disease, organism> Yersinina pestis is a gram-negative, rod-shaped, faculatively anaerobic bacterial species in the family Enterobacteriaceae. It causes bubonic plaque, which is transmitted by rodent fleas. Historically known as the Black Plague, this disease devastated Europe and Asia in the 1300s. It still exists today and is characterised by sudden high fever, chills, excessively swollen and tender lymph nodes (buboes), followed by tissue bleeding and gangrene. Other complications include pneumonia and septicaemia. (12 Nov 1997) |
| yersiniosis | A common human infectious disease caused by Yersinia enterocolitica and marked by diarrhoea, enteritis, pseudoappendicitis, ileitis, erythema nodosum, and sometimes septicaemia or acute arthritis. (05 Mar 2000) |
| yes | Ay; yea; a word which expresses affirmation or consent; opposed to no. Yes is used, like yea, to enforce, by repetition or addition, something which precedes; as, you have done all this yes, you have done more. "Yes, you despise the man books confined." "The fine distinction between 'yea' and 'yes,' 'nay' and 'no,' that once existed in English, has quite disappeared. 'Yea' and 'nay' in Wyclif's time, and a good deal later, were the answers to questions framed in the affirmative. 'Will he come?' To this it would have been replied, 'Yea' or 'Nay', as the case might be. But, 'Will he not come?' To this the answer would have been 'Yes' or 'No.' Sir Thomas More finds fault with Tyndale, that in his translation of the Bible he had not observed this distinction, which was evidently therefore going out even then, that is, in the reign of Henry VIII.; and shortly after it was quite forgotten." Origin: OE. Yis, yis, yes, yise, AS. Gese, gise; probably fr. Gea yea + swa so. See Yea, and So. Source: Websters Dictionary (01 Mar 1998) |
| yet | <zoology> Any one of several species of large marine gastropods belonging to the genus Yetus, or Cymba; a boat shell. Source: Websters Dictionary (01 Mar 1998) |