Kakistocracy (n.)
definition: Government by the worst men.

Kakistocracy is a 12 letter word that begins with a K and ends in a Y

Kaleidophone
definition: An instrument invented by Professor Wheatstone
Consisting of a reflecting knob at the end of a vibrating rod or thin plate for making visible in the motion of a point of light reflected from the knob the paths or curves corresponding with the musical notes produced by the vibrations.
Kaleidophone is a 12 letter word that begins with a K and ends in an E

Kaleidoscope (n.)
definition: An instrument invented by Sir David Brewster
Which contains loose fragments of colored glass etc. and reflecting surfaces so arranged that changes of position exhibit its contents in an endless variety of beautiful colors and symmetrical forms. It has been much employed in arts of design.
Kaleidoscope is a 12 letter word that begins with a K and ends in an E

Karyokinesis (n.)
definition: The indirect division of cells in which
Prior to division of the cell protoplasm complicated changes take place in the nucleus attended with movement of the nuclear fibrils; -- opposed to karyostenosis. The nucleus becomes enlarged and convoluted and finally the threads are separated into two groups which ultimately become disconnected and constitute the daughter nuclei. Called also mitosis. See Cell development under Cell.
Karyokinesis is a 12 letter word that begins with a K and ends in an S

Karyokinetic (a.)
definition: Of or pertaining to karyokinesis; as
Karyokinetic changes of cell division.
Karyokinetic is a 12 letter word that begins with a K and ends in a C

Kathetometer (n.)
definition: Same as Cathetometer.

Kathetometer is a 12 letter word that begins with a K and ends in an R

Kendal green
definition: Alt. of Kendal

Kendal green is a 12 letter word that begins with a K and ends in an N

Keratogenous (a.)
definition: Producing horn; as
The keratogenous membrane within the horny hoof of the horse.
Keratogenous is a 12 letter word that begins with a K and ends in an S

Keraunograph (n.)
definition: A figure or picture impressed by lightning upon the human body or elsewhere.

Keraunograph is a 12 letter word that begins with a K and ends in a H

Kinaesthesis (n.)
definition: The perception attendant upon the movements of the muscles.

Kinaesthesis is a 12 letter word that begins with a K and ends in an S

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