| fibrillar region | <cell biology> Dense staining region of the nucleolus composed of 5nm fibres, RNA transcripts. (12 Nov 1997) |
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| fibrillar | 1. Relating to a fibril. 2. <biology> Denoting the fine rapid contractions or twitchings of fibres or of small groups of fibres in skeletal or cardiac muscle. Synonym: filar. (05 Mar 2000) |
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| fibrillar baskets | <biology> The scleral end of neuroglia fibres of Muller that as fine, tapering, needlelike fibrillae ascend the proximal parts of rods and cones, giving them a fibrillar appearance. (05 Mar 2000) |
| fibrillar centre | <cell biology> Location of the nucleolar ribosomal chromatin at telophase: as the nucleolus becomes active the ribosomal chromatin and associated ribonucleoprotein transcripts compose the more peripherally located dense fibrillar component. (12 Nov 1997) |
| anal region | The posterior portion of the perineal region through which the anal canal opens; bounded by a line through both isehial tuberosities, the sacrotuberous ligaments and the coccyx. Synonym: regio analis, anal region. (05 Mar 2000) |
| ankle region | The region of the lower limb between the leg (crus) and the foot (pes). Synonym: regio talocruralis. (05 Mar 2000) |
| anterior antebrachial region | The area between the radial and ulnar borders of the forearm anteriorly. Synonym: facies antebrachialis anterior, regio antebrachialis anterior, anterior antebrachial region, anterior surface of forearm, facies anterior antebrachii. (05 Mar 2000) |
| anterior brachial region | The anterior region of the arm. (05 Mar 2000) |
| anterior carpal region | The anterior part of the wrist. Synonym: regio carpalis anterior. (05 Mar 2000) |
| anterior crural region | The anterior surface of the inferior limb between the knee and the ankle. Synonym: facies cruralis anterior, regio cruralis anterior, anterior crural region, anterior surface of leg, facies anterior cruris. (05 Mar 2000) |
| anterior cubital region | The area in front of the elbow, including the cubital fossa. Synonym: facies cubitalis anterior, regio cubitalis anterior, anterior cubital region, anterior surface of elbow. (05 Mar 2000) |
| anterior hypothalamic region | The rostral portion of the hypothalamus that includes preoptic, supraoptic, paraventricular and anterior hypothalamic nuclei; the hypothalamic structures located internally in the general area of the optic chiasm. (05 Mar 2000) |
| anterior knee region | The anterior region of the knee. Synonym: regio genus anterior. (05 Mar 2000) |
| anterior region of arm | Area between deltoid region superiorly and anterior region of elbow inferiorly. Synonym: facies brachialis anterior, regio brachialis anterior, anterior surface of arm, facies anterior brachii. (05 Mar 2000) |
| anterior region of elbow | The area in front of the elbow, including the cubital fossa. Synonym: facies cubitalis anterior, regio cubitalis anterior, anterior cubital region, anterior surface of elbow. (05 Mar 2000) |
| anterior region of forearm | The area between the radial and ulnar borders of the forearm anteriorly. Synonym: facies antebrachialis anterior, regio antebrachialis anterior, anterior antebrachial region, anterior surface of forearm, facies anterior antebrachii. (05 Mar 2000) |