Invisible[expr] displays as space that is the same size as the formatted version of expr.
Joined
(Built-in Mathematica Symbol) Joined is an option for ListPlot and related functions that specifies whether points in each dataset should be joined into a line, or should be plotted as separate points.
Khinchin is Khinchin's constant, with numerical value \[TildeEqual] 2.68545.
Latitude[pos] gives the latitude in degrees of a geographic position specified by pos.Latitude[pos, datum] gives the latitude referring to the specified geodetic datum.
Legended[expr, lbl] indicates that a legend entry for expr should be created, with label lbl.
LeviCivitaTensor[d] gives the d-dimensional Levi-Civita totally antisymmetric tensor.
LibraryFunctionInformation[fun] returns information about a LibraryFunction.
LightingAngle is an option for ReliefPlot and related functions that specifies the angle from which simulated illumination is taken to come.
LimitsPositioning is an option for UnderoverscriptBox and related boxes that specifies whether to change the positioning of underscripts and overscripts in the way ...
LinebreakAdjustments is an option for selections that sets parameters used for calculating where automatic line breaks should be inserted.