| HL | hairline; hairy leukoplakia; half life; hearing level; hearing loss; heparin lock; histiocytic lymph... |
|---|---|
| LIA | Laser Institute of America; leukemia-associated inhibitory activity; lock-in amplifier; lymphocyte-i... |
| ELF | elective low forceps; extremely low frequency |
| FACH | forceps to after-coming head |
| FD | familial dysautonomia; family doctor; fan douche; fatal dose; fetal danger; fibrin derivative; fibro... |
| OVAR | Off vertical axis rotation |
|---|---|
| IR | internal rotation |
locked-in syndrome
| key-in-lock manoeuvre | A method by which obstetrical forceps are used to rotate the foetal head. Synonym: DeLee's manoeuvre. (05 Mar 2000) |
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| lock-and-key model | A model used to suggest the mode of operation of an enzyme in which the substrate fits into the active site of the protein like a key into a lock. (05 Mar 2000) |
| lock and key models | <chemistry, immunology> Specific recognition in biological systems might be mediated through interactions that depend upon very precise steric matching between receptor and ligand or between enzyme and substrate. The commonly used analogy is between lock and key and implies a precise sterically determined interaction. (18 Nov 1997) |
| centre of rotation | A point or line around which all other points in a body move. See: axis. (05 Mar 2000) |
| rotation | <dentistry> A movement in which the tooth turned along the long axis of the tooth. (08 Jan 1998) |
| rotation flap | A pedicle flap that is rotated from the donor site to an adjacent recipient area, usually as a direct flap. (05 Mar 2000) |
| rotation therapy | Teletherapy in which a desirable radiation dose distribution is achieved by rotating the patient or machine about an axis passing through the centre of the tumour. (05 Mar 2000) |
| short rotation energy plantation | Plantings established and managed under short-rotation intensive culture practices. (05 Dec 1998) |
| short rotation intensive culture | Intensive management and harvesting at 2 to 10 year intervals of cycles of specially selected fast- growing hardwood species for the purpose of producing wood as an energy feedstock. (05 Dec 1998) |
| intestinal rotation | See: malrotation. Molecular rotation, one hundredth of the product of the specific rotation of an optically active compound and its molecular weight. Optical rotation, the change in the plane of polarization of polarised light of a given wavelength upon passing through optically active substances; measured in terms of specific rotation by polarimetry, an important tool in chemical structural work, especially on carbohydrates. Specific optical rotation ([a]), the arc through which the plane of polarised light is rotated by 1 gram of a substance per milliliter of water when the length of the light path through the solution is 1 decimeter, typically using light corresponding to the D line of sodium. (05 Mar 2000) |
| air-lock | <microscopy> An intermediate, enclosed chamber of a vacuum or pressure system through which an object may be passed without effectively changing the vacuum or pressure of the main body of the system. Reference here is to the vacuum of all electron microscopes. (05 Aug 1998) |
| lock | 1. Anything that fastens; specifically, a fastening, as for a door, a lid, a trunk, a drawer, and the like, in which a bolt is moved by a key so as to hold or to release the thing fastened. 2. A fastening together or interlacing; a closing of one thing upon another; a state of being fixed or immovable. "Albemarle Street closed by a lock of carriages." (De Quincey) 3. A place from which egress is prevented, as by a lock. 4. The barrier or works which confine the water of a stream or canal. 5. An inclosure in a canal with gates at each end, used in raising or lowering boats as they pass from one level to another; called also lift lock. 6. That part or apparatus of a firearm by which the charge is exploded; as, a matchlock, flintlock, percussion lock, etc. 7. A device for keeping a wheel from turning. 8. A grapple in wrestling. Detector lock, a lock containing a contrivance for showing whether it as has been tampered with. Lock bay, a range of bond stone. Mortise lock, a door lock inserted in a mortise. Rim lock, a lock fastened to the face of a door, thus differing from a mortise lock. Origin: AS. Loc inclosure, an inclosed place, the fastening of a door, fr. Lucan to lock, fasten; akin to OS. Lukan (in comp), D. Luiken, OHG. Luhhan, Icel. Lka, Goth. Lukan (in comp); cf. Skr. Ruj to break. Cf. Locket. Source: Websters Dictionary (01 Mar 1998) |
| lock finger | An affection in which the movement of the finger is arrested for a moment in flexion or extension and then continues with a jerk. Synonym: jerk finger, lock finger, snap finger, spring finger, stuck finger. (05 Mar 2000) |
| lock hospital | A hospital for the treatment of venereal diseases. Source: Websters Dictionary (01 Mar 1998) |
| lock step | A mode of marching by a body of men going one after another as closely as possible, in which the leg of each moves at the same time with the corresponding leg of the person before him. Source: Websters Dictionary (01 Mar 1998) |
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