| qid | <abbreviation> L. Quater in die, four times a day. (05 Mar 2000) |
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| pen | 1. A feather. 2. A wing. 3. An instrument used for writing with ink, formerly made of a reed, or of the quill of a goose or other bird, but now also of other materials, as of steel, gold, etc. Also, originally, a stylus or other instrument for scratching or graving. "Graven with an iron pen and lead in the rock." (Job xix. 24) 4. A writer, or his style; as, he has a sharp pen. "Those learned pens." 5. <zoology> The internal shell of a squid. 6. [Etymol. Uncertain. <zoology> A female swan. Bow pen. See Bow-pen. Dotting pen, a pen for drawing dotted lines. Drawing, or Ruling, pen, a pen for ruling lines having a pair of blades between which the ink is contained. Fountain pen, Geometric pen. See Fountain, and Geometric. Music pen, a pen having five points for drawing the five lines of the staff. Pen and ink, or pen-and-ink, executed or done with a pen and ink; as, a pen and ink sketch. Pen feather. A pin feather. Pen name. See Name. <zoology> Sea pen, a pennatula. [Usually written sea-pen. Origin: OE. Penne, OF. Penne, pene, F. Penne, fr. L. Penna. Source: Websters Dictionary (01 Mar 1998) |
| sea-pen | <zoology> A pennatula. Source: Websters Dictionary (01 Mar 1998) |
| precision | 1. The quality of being sharply defined or stated; one measure of precision is the number of distinguishable alternatives to a measurement. 2. In statistics, the inverse of the variance of a measurement or estimate. 3. Reproducibility of a quantifiable result; an indication of the random error. (05 Mar 2000) |
| precision attachment | A frictional or mechanically retained unit used in fixed or removable prosthodontics, consisting of closely fitting male and female parts, an attachment that may be rigid in function or may incorporate a movable stress control unit to reduce the torque on the abutment. Synonym: frictional attachment, internal attachment, key attachment, keyway attachment, parallel attachment, slotted attachment. (05 Mar 2000) |
| precision rest | A rest consisting of closely interlocking parts. (05 Mar 2000) |
| denture precision attachment | A precision device used for attaching a fixed or removable partial denture to the crown of an abutment tooth or a restoration. One type is the intracoronal attachment and the other type is the extracoronal attachment. It consists of a female portion within the coronal portion of the crown of an abutment and a fitted male portion attached to the denture proper. (12 Dec 1998) |