| du | dial unit |
|---|---|
| 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... |
locked-in syndrome
| astigmatic dial | A diagram of radiating lines, used to test for astigmatism. (05 Mar 2000) |
|---|---|
| dial | 1. An instrument, formerly much used for showing the time of day from the shadow of a style or gnomon on a graduated arc or surface; especially, a sundial; but there are lunar and astral dials. The style or gnomon is usually parallel to the earth's axis, but the dial plate may be either horizontal or vertical. 2. The graduated face of a timepiece, on which the time of day is shown by pointers or hands. 3. A miner's compass. <zoology> Dial bird, an Indian bird (Copsychus saularius), allied to the European robin. The name is also given to other related species. Dial lock, a lock provided with one or more plates having numbers or letters upon them. These plates must be adjusted in a certain determined way before the lock can be operated. Dial plate, the plane or disk of a dial or timepiece on which lines and figures for indicating the time are placed. Origin: LL. Dialis daily, fr. L. Dies day. See Deity. 1. To measure with a dial. "Hours of that true time which is dialed in heaven." (Talfourd) 2. <chemical> To survey with a dial. Origin: Dialed or Dialled; Dialing or Dialling. Source: Websters Dictionary (01 Mar 1998) |
| dial manometer | aneroid manometer |
| 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) |
| key-in-lock manoeuvre | A method by which obstetrical forceps are used to rotate the foetal head. Synonym: DeLee's manoeuvre. (05 Mar 2000) |
| 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-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) |
| 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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