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  2. M line - Wikipedia

    en.wikipedia.org/wiki/M_line

    M line may refer to: M-line (mittel line or middle line), a structure in a muscle sarcomere; M Ocean View, a light rail and former streetcar line in San Francisco, California; McKinney Avenue Transit Authority, a streetcar line in Dallas, Texas also named the M-Line; M (Los Angeles Railway), a former streetcar service; Geometric mean

  3. Slope - Wikipedia

    en.wikipedia.org/wiki/Slope

    Slope illustrated for y = (3/2)x − 1.Click on to enlarge Slope of a line in coordinates system, from f(x) = −12x + 2 to f(x) = 12x + 2. The slope of a line in the plane containing the x and y axes is generally represented by the letter m, [5] and is defined as the change in the y coordinate divided by the corresponding change in the x coordinate, between two distinct points on the line.

  4. Line (geometry) - Wikipedia

    en.wikipedia.org/wiki/Line_(geometry)

    In geometry, a straight line, usually abbreviated line, is an infinitely long object with no width, depth, or curvature, an idealization of such physical objects as a straightedge, a taut string, or a ray of light. Lines are spaces of dimension one, which may be embedded in spaces of dimension two, three, or higher.

  5. Mason–Dixon line - Wikipedia

    en.wikipedia.org/wiki/Mason–Dixon_line

    The Mason–Dixon line was marked by stones every mile 1 mile (1.6 km) and "crownstones" every 5 miles (8.0 km), using stone shipped from England. The Maryland side says "(M)" and the Delaware and Pennsylvania sides say "(P)". [11] Crownstones included both coats of arms.

  6. Sarcomere - Wikipedia

    en.wikipedia.org/wiki/Sarcomere

    A sarcomere is defined as the segment between two neighbouring Z-lines (or Z-discs). In electron micrographs of cross-striated muscle, the Z-line (from the German "zwischen" meaning between) appears in between the I-bands as a dark line that anchors the actin myofilaments. Surrounding the Z-line is the region of the I-band (for isotropic). I ...

  7. Parallel (geometry) - Wikipedia

    en.wikipedia.org/wiki/Parallel_(geometry)

    Given parallel straight lines l and m in Euclidean space, the following properties are equivalent: Every point on line m is located at exactly the same (minimum) distance from line l (equidistant lines). Line m is in the same plane as line l but does not intersect l (recall that lines extend to infinity in either direction).

  8. Homogeneous coordinates - Wikipedia

    en.wikipedia.org/wiki/Homogeneous_coordinates

    Thus we define (,,) as the homogeneous coordinates of the point at infinity corresponding to the direction of the line + =. As any line of the Euclidean plane is parallel to a line passing through the origin, and since parallel lines have the same point at infinity, the infinite point on every line of the Euclidean plane has been given ...

  9. Glossary of rail transport terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_rail_transport...

    Rail transport terms are a form of technical terminology applied to railways. Although many terms are uniform across different nations and companies, they are by no means universal, with differences often originating from parallel development of rail transport systems in different parts of the world, and in the national origins of the engineers and managers who built the inaugural rail ...