K-band
K-factor
K-type patch bay
Ka-band
Kalman filter
Karat
Karst
KDC
Kelt
Kelvin
Kendall effect
Keratin
Kernel
Kerogen
Kerr electro-optic effect
Ketal
Ketamine
Ketone
Ketose
Key
Key telephone system
Keystone predator
Keystone species
Keyway
Kidney
Kiln
Kilohertz
Kilometer
Kinase
Kinematic viscosity
Kinematics
Knife-edge effect
Knot
Known sample
Knuckles
Krebs cycle
KTS
Ku-band
Kunkar