| frontal suture | The suture between the two halves of the frontal bone, usually obliterated by about the sixth year; if persistent it is called a metropic suture. Synonym: sutura frontalis. (05 Mar 2000) |
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| frontal triangle | A triangle bounded above by the maximum frontal diameter and laterally by lines joining the extremities of this diameter with the glabella. (05 Mar 2000) |
| frontal tuber | The most prominent portion of the frontal bone on either side. Synonym: tuber frontale, eminentia frontalis, frontal tuber. (05 Mar 2000) |
| frontal veins | The superficial veins draining the frontal cortex and emptying into the superior sagittal sinus. Synonym: supratrochlear veins. (05 Mar 2000) |
| frontal zone contraction theory | Model proposed to account for the movement of giant amoebae in which cytoplasmic contraction at the front of the leading pseudopod (fountain zone) pulls viscoelastic cytoplasm forward in the centre of the cell and forms a tube of more rigid cytoplasm immediately below the plasma membrane behind the active region. The peripheral contracted cytoplasm relaxes into a weaker gel at the rear and is pulled forward in its turn. Contrasts with the ectoplasmic tube contraction model. (18 Nov 1997) |
| frontalis | Synonym: frontal. Origin: L. (05 Mar 2000) |
| frontalis muscle | <anatomy> The anterior belly of the occipitofrontalis muscle. See: occipitofrontalis muscle. Synonym: venter frontalis musculi occipitofrontalis, frontalis muscle. (05 Mar 2000) |
| frontignan | 1. A sweet muscadine wine made in Frontignan (Languedoc), France. 2. <botany> A grape of many varieties and colours. Origin: So called from Frontignan, a town in Southern France. Source: Websters Dictionary (01 Mar 1998) |
| frontlet | 1. A frontal or brow band; a fillet or band worn on the forehead. "They shall be as frontlets between thine eyes." (Deut. Vi. 8) 2. A frown (likened to a frontlet). "What makes that frontlet on? Methinks you are too much of late i' the frown." (Shak) 3. <ornithology> The margin of the head, behind the bill of birds, often bearing rigid bristles. Origin: OF. Frontelet brow band, dim. Of frontel, frontal. See Frontal. Source: Websters Dictionary (01 Mar 1998) |
| fronto- | <anatomy, prefix> A combining form signifying relating to the forehead or the frontal bone; as, fronto-parietal, relating to the frontal and the parietal bones; fronto-nasal, etc. Origin: L. Frons, frontis, the forehead. (29 Oct 1998) |
| fronto-occipital | Relating to the frontal and the occipital bones, or to the forehead and the occiput. (05 Mar 2000) |
| fronto-occipital fasciculus | A bundle of association fibres extending from the frontal to the occipital lobes of the cerebrum. Synonym: fasciculus occipitofrontalis, fronto-occipital fasciculus. (05 Mar 2000) |
| fronto-orbital area | The cerebral cortex covering the basal surface of the frontal lobes. Synonym: fronto-orbital area. (05 Mar 2000) |
| frontoanterior position | A cephalic presentation of the foetus with its forehead directed toward the right (right frontoanterior, RFA) or to the left (left frontoanterior, LFA) of the acetabulum of the mother. (05 Mar 2000) |
| frontoethmoidal suture | Line of union between the cribriform plate of the ethmoid and the orbital plate and posterior margin of the nasal process of the frontal bone. Synonym: sutura frontoethmoidalis. (05 Mar 2000) |