| atrium cordis | The upper chamber of each half of the heart. Synonym: atrium cordis, atrium. Left atrium of heart, atrium of the left side of the heart which receives the blood from the pulmonary veins. Synonym: atrium sinistrum cordis, atrium pulmonale. (05 Mar 2000) |
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| atrium dextrum cordis | Right atrium, the atrium of the right side of the heart which receives the blood from the venae cavae and coronary sinus. Synonym: atrium dextrum cordis. (05 Mar 2000) |
| atrium glottidis | The upper part of the laryngeal cavity from the superior aperture to the vestibular folds, bounded anteriorly by the epiglottis, laterally by themucosa overlying the quadrangular membranes and posteriorly by the mucosa overlying the arytenoid cartilages and arytenoideus muscle. Synonym: vestibulum laryngis, atrium glottidis, superior laryngeal cavity. (05 Mar 2000) |
| atrium meatus medii | The anterior expanded portion of the middle meatus of the nose, just above the vestibule. Synonym: atrium meatus medii, atrium. (05 Mar 2000) |
| atrium of heart | The upper chamber of each half of the heart. Synonym: atrium cordis, atrium. Left atrium of heart, atrium of the left side of the heart which receives the blood from the pulmonary veins. Synonym: atrium sinistrum cordis, atrium pulmonale. (05 Mar 2000) |
| atrium pulmonale | left atrium of heart |
| atrium sinistrum cordis | left atrium of heart |
| atrocha | <zoology> A kind of chaetopod larva in which no circles of cilia are developed. Origin: NL, fr. Gr. Priv. + a circle. Source: Websters Dictionary (01 Mar 1998) |
| Atropa | A genus of plants (family Solanaceae) of which Atropa belladonna is typical. See: belladonna. Origin: G. Atropos, one of the Fates cutting the thread of life, because of the lethal effects of the plant (05 Mar 2000) |
| atrophedema | A vascular reaction involving the deep dermis or subcutaneous or submucal tissues, representing localised oedema caused by dilatation and increased permeability of the capillaries and characterised by development of giant wheals. (18 Nov 1997) |
| atrophia | Synonym: atrophy. Origin: G. Fr. A-priv. + trophe, nourishment (05 Mar 2000) |
| atrophia cutis | Atrophy of the skin that may occur either in discrete localised areas or in widespread areas. See: anetoderma. Synonym: atrophia cutis. (05 Mar 2000) |
| atrophia maculosa varioliformis cutis | Atrophoderma in which the skin becomes bag like and wrinkled. Synonym: atrophia maculosa varioliformis cutis, atrophoderma maculatum, macular atrophy, primary idiopathic macular atrophy, primary macular atrophy of skin. Origin: G. Anetos, relaxed, + derma, skin (05 Mar 2000) |
| atrophia pilorum propria | A general term that includes fragilitas crinium, trichorrhexis nodosa, monilethrix, and atrophy of the hair. (05 Mar 2000) |
| atrophic | Relating to atrophy. Source: Websters Dictionary (01 Mar 1998) |