| lambdoid suture | <anatomy> Line of union between the occipital and the parietal bones. Synonym: sutura lambdoidea. (05 Mar 2000) |
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| lambdoid suture defect | <radiology> Well-defined lucent lesion, classically unilateral, associated with neurofibromatosis (12 Dec 1998) |
| 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) |
| 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) |
| frontolacrimal suture | Line of union between the upper margin of the lacrimal and the orbital plate of the frontal bone. Synonym: sutura frontolacrimalis. (05 Mar 2000) |
| frontomaxillary suture | Articulation of the frontal process of the maxilla with the frontal bone. Synonym: sutura frontomaxillaris. (05 Mar 2000) |
| frontonasal suture | Line of union of the frontal and of the two nasal bones. Synonym: sutura frontonasalis, sutura nasofrontalis. (05 Mar 2000) |
| frontozygomatic suture | Line of union between the zygomatic process of the frontal and the frontal process of the zygomatic bone. Synonym: sutura frontozygomatica, sutura zygomaticofrontalis. (05 Mar 2000) |
| Frost suture | Intermarginal suture between the eyelids to protect the cornea. (05 Mar 2000) |
| Lembert suture | The second row of the Czerny-Lembert intestinal suture; an inverting suture for intestinal surgery, used either as a continuous suture or interrupted suture, producing serosal apposition and including the collagenous submucosal layer but not entering the lumen of the intestine. (05 Mar 2000) |