slab line

English

Pronunciation

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Noun

slab line (plural slab lines)

  1. (nautical) A line or small rope by which sailors haul up the foot of the mainsail or foresail.
    • 1713, Nathaniel Ward, The Simple Cobler of Aggawam in America:
      when Kings are hailing up their topgallants , Subjects lay hold on their slablines
    • 1868, The seaman's catechismn and instructor in gunnery, etc, page 134:
      Take the end up under and before the quarter of the main yard abaft the sail, reeve it through the quarter slab-line block on the jack-stay, then carry the end out to the slab-line block, which is seized on the jack-stay where the leech-line block is made fast, reeve it from in out, and bend it on to the leech of the sail, where the leech-line is bent to.
  2. (optometry) The line on a pair of lenses that indicates where a slab-off prism has been applied.
    • 2023, Clifford W. Brooks, Although Fresnel prism may be used for full-time wear, if successfully worn, it is possible to replace it by ordering slab-off prism with the slab line oriented vertically., page 425:
      Although Fresnel prism may be used for full-time wear, if successfully worn, it is possible to replace it by ordering slab-off prism with the slab line oriented vertically.
  3. (Texas, slang) An informal car club for customized slabs (luxury pre-1980 General Motors vehicles)
    • 2016, Langston Collin Wilkins, “Officially Ridin' Swangas: Slab as tangible and intangible cultural heritage in Houston, Texas”, in Michelle L. Stefano, Peter Davis, editor, The Routledge Companion to Intangible Cultural Heritage, page 211:
      A single slab line is comprised of cars that share a paint color and originate from the same area of Houston , and they congregate at social events, such as block parties or car shows. Slab lines proceed into an event in a straight line.
  4. (electrical engineering) A central conductor surrounded by two planar ground slabs.
    • 2008, Stanislaw Rosloniec, Fundamental Numerical Methods for Electrical Engineering, page 258:
      As most of air-dielectric lines the shielded slab line is particularly recommended for operation at high peak and average powers.
    • 2013, Bert Henderson , Edmar Camargo, Microwave Mixer Technology and Applications, page 361:
      The line continues through the side wall of the waveguide where it transitions to an air-dielectric stripline consisting of cavity 2 with a metallic slab line.
    • 2013, Valeria Teppati, Andrea Ferrero, Mohamed Sayed, Modern RF and Microwave Measurement Techniques, page 348:
      As shown in Figure 13.2, it is based on a slab line, consisting of two parallel ground planes with a center main line, plus a reflective element (a conductive “probe”).
  5. (climbing) A climbing route that is characterized by a relatively low-angle rock face or slab that lacks significant vertical features such as large holds or overhangs.
    • 1987, Mountain, page 11:
      What a Difference a Day Makes ( E5 6a Steve Howe and Iwan Jones ) takes a groove and slab line to the left while , Lasagne Verdi ( E5 6b-Pritchard and Dixon) takes a left to right diagonal across the crag.
    • 2012, Stewart M. Green, Rock Climbing Utah, page 460:
      Serious slab line right of S-Direct.
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