| linear energy transfer | <radiobiology> Average amount of energy lost per unit of particle track length and expressed in keV um-1. Acronym: LET (16 Dec 1997) |
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| lion-jaw bone-holding forceps | A sturdy forceps with strong sharp teeth in the jaws, used for holding bone fragments. (05 Mar 2000) |
| Lowenberg's forceps | Forceps with short curved blades ending in rounded grasping extremities devised for the removal of adenoid growths in the nasopharynx. (05 Mar 2000) |
| low forceps delivery | Delivery by forceps applied to the foetal head after it is clearly visible, the skull has reached the perineal floor, and plus 2 (+2) station. This classification of forceps delivery may be with or without rotation of the foetal head. (05 Mar 2000) |