tau LAU cmavo

2-word letteral/shift: change case for next letteral only.

On gloss:

tau'u in sense "2 pi"
digit/number: tau (approximately 6.2831...). The constant defined by the ratio of the circumference to the radius of all circles.

On affix form:

x1 is a binary metaphor formed with x2 modifying x3, giving meaning x4 in usage/instance x5.

In definition:

x1 is the "ce ki tau jau" dialect of Lojban, used by x2 to communicate x3 (si'o/du'u)
x1 is the 'ce ki tau jei' dialect of Lojban, used by x2 to communicate x3 (si'o/du'u)

In notes:

imaginary i, comma - spherical coordinates: first coordinate gives magnitude (complex modulus/radius) of the number, the second number gives the angle from the positive real axis measured counterclockwise toward the 'positive' imaginary axis (default: in the primary branch/Arg) as measured in some units (which that number should contain; the contextless default will suppose radians); the angle is not normalized.
mekso operator: finite result set derived from/on set A with/due to operator/function B under ordering of application C