| mentoanterior position | A cephalic presentation of the foetus with its chin pointing to the right (right mentoanterior, RMA) or to the left (left mentoanterior, LMA) acetabulum of the mother. (05 Mar 2000) |
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| mentolabial furrow | The indistinct line separating the lower lip from the chin. Synonym: mentolabial furrow, sulcus mentolabialis. (05 Mar 2000) |
| mentolabial sulcus | The indistinct line separating the lower lip from the chin. Synonym: mentolabial furrow, sulcus mentolabialis. (05 Mar 2000) |
| mentolabialis | The mentalis and depressor labii inferioris considered as one muscle. Origin: L. (05 Mar 2000) |
| mentomeckelian | <anatomy> Of or pertaining to the chin and lower jaw. The bone or cartilage forming the anterior extremity of the lower jaw in some adult animals and the young of others. Origin: 1st mental + Meckelian. Source: Websters Dictionary (01 Mar 1998) |
| menton | In cephalometrics, the lowermost point in the symphysial shadow as seen on a lateral jaw projection. Origin: L. Mentum, chin (05 Mar 2000) |
| mentoplasty | Plastic surgery of the chin, whereby its shape or size is altered. Synonym: genioplasty. Origin: L. Mentum, chin, + G. Plastos, formed (05 Mar 2000) |
| mentoposterior position | A cephalic presentation of the foetus with its chin pointing to the right (right mentoposterior, RMP) or to the left (left mentoposterior, LMP) sacroiliac articulation of the mother. (05 Mar 2000) |
| mentors | Senior professionals who provide guidance, direction and support to those persons desirous of improvement in academic positions, administrative positions or other career development situations. (12 Dec 1998) |
| mentotransverse position | A cephalic presentation of the foetus with its chin pointing to the right (right mentotransverse, RMT) or to the left (left mentotransverse, LMT) iliac fossa of the mother. (05 Mar 2000) |
| mentum | <zoology> The front median plate of the labium in insects. See Labium. Origin: L, chin. Source: Websters Dictionary (01 Mar 1998) |
| menyanthes | buckbean |