Kt

A unit of fineness or concentration of gold equalling 1/24 part of gold in an alloy.

A measure of the strength of an explosion or a bomb based on how many thousand tons of TNT would be needed to produce the same energy.

"That's a 300-kiloton nuclear warhead."

A looping of a piece of string or of any other long, flexible material that cannot be untangled without passing one or both ends of the material through its loops.

"Climbers must make sure that all knots are both secure and of types that will not weaken the rope."

(of hair, etc) A tangled clump.

"The nurse was brushing knots from the protesting child's hair."

A maze-like pattern.

A non-self-intersecting closed curve in (e.g., three-dimensional) space that is an abstraction of a knot (in sense 1 above).

"A knot can be defined as a non-self-intersecting broken line whose endpoints coincide: when such a knot is constrained to lie in a plane, then it is simply a polygon."

One of a variety of shore birds; the red-breasted sandpiper (variously Calidris canutus or Tringa canutus).