Ka

Kaiser Bessel Window

A weighting that is applied in the time domain to reduce leakage within a Fourier Transform analysis.

Kalium

The old name for Potassium and from where the chemical symbol K was derived.

Kalman Filter

A technique for estimating an unknown state of a linear dynamic system given observations of the system which have additive (Gaussian) noise.

Kaon

A meson containing a strange quark and an anti-up (or anti-down) quark, or an anti-strange quark and an up (or down) quark.

Kapok

Used as an insulating or flotation material it comes from the seed hairs of the kapok tree (Ceiba Pentranda).

kappa

A letter of the Greek alphabet.