| natal | 1. Relating to birth. Origin: L. Natalis, fr. Nascor, pp. Natus, to be born 2. Relating to the buttocks or nates. Origin: L. Nates, buttocks (05 Mar 2000) |
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| natal cleft | The sulcus between the buttocks (nates). Synonym: crena ani, anal cleft, crena clunium, gluteal cleft. (05 Mar 2000) |
| natal plum | <botany> The drupaceous fruit of two South African shrubs of the genus Arduina (A. Bispinosa and A. Grandiflora). Source: Websters Dictionary (01 Mar 1998) |
| Natal's sore | Lesion of cutaneous leishmaniasis. (05 Mar 2000) |
| natal teeth | Predeciduous teeth present at birth. They may be well formed and normal or may represent hornified epithelial structures without roots. They are found on the gingivae over the crest of the ridge and arise from accessory buds of the dental lamina ahead of the deciduous buds or from buds of the accessory dental lamina. (12 Dec 1998) |
| natal tooth | A predeciduous supernumerary tooth present at birth. (05 Mar 2000) |
| paraganglioma, extra-adrenal | A relatively rare, usually benign neoplasm originating in the chemoreceptor tissue of the carotid body, glomus jugulare, and aortic bodies. It consists histologically of rounded or ovoid hyperchromatic cells that tend to be grouped in an alveolus-like pattern within a scant to moderate amount of fibrous stroma and a few large thin-walled vascular channels. They are uncommon before the age of 20, with a female predominance in some series. (12 Dec 1998) |
| extra | 1. Something in addition to what is due, expected, or customary; something in addition to the regular charge or compensation, or for which an additional charge is made; as, at European hotels lights are extras. 2. <prefix> Without, outside of. Source: Websters Dictionary (21 Jun 2000) |
| extra-abdominal desmoid | A deep-seated firm tumour, most frequently occurring on the shoulders, chest, or back of young men or women, consisting of collagenous fibrous tissue that infiltrates surrounding muscle; frequently recurs but does not metastasize. (05 Mar 2000) |
| extra-anatomic bypass | A vascular bypass that does not conform to the preexisting anatomy. (05 Mar 2000) |
| extra-articular | <anatomy> Situated outside of a joint. Source: Websters Dictionary (01 Mar 1998) |
| extra-axial | Off the axis; applied to intracerebral lesions that do not arise from the brain itself. (05 Mar 2000) |
| extra-floral | Of nectaries, not within the flower. (09 Oct 1997) |
| extra nodal lymphoma | <oncology, tumour> Literally outside the lymph nodes, but exhibiting the characteristics of lymph node cancer. A term used to describe the extent and site of disease. (27 Sep 1997) |
| extra-ocular muscle disease | <radiology> Graves disease, pseudotumour, lymphoma, metastasis, infection, carotid-cavernous fistula, granulomatous disease (12 Dec 1998) |