keep one's mouth shut

keep one's nose to the grindstone

keep one's shoulder to the wheel

kelvin'A=0

kendall's tau

kepler's first law

kepler's law

kepler's law of planetary motion

kepler's second law

kepler's third law

kernig's sign

kick one's heels

king arthur's round table

king's counsel

king's english

king's evil

king's ransom

king's spear

kipp's apparatus

kirchhoff's laws

klinefelter's syndrome

knight's service

knowlton's cactus

know what's going on

know what's what

ko'd

koplik's spots

korsakoff's psychosis

korsakoff's syndrome

korsakov's psychosis

korsakov's syndrome

kundt's tube

k'ung futzu

kupffer's cell

kussmaul's coma

ladies'-eardrop

ladies'-eardrops

ladies' man

ladies' room

ladies' slipper

ladies' tobacco

ladies' tresses

lad's love

lady's-eardrop

lady's-eardrops

lady's earrings

lady's-finger

lady's laces

lady's leek

lady's maid

lady's slipper

lady's smock

lady's thistle

lady's tobacco

lady's tresses

lafora's disease

lag b'omer

lamb's lettuce

lamb's-quarter

lamb's-quarters

landlord's lien

landry's paralysis

lane's prince albert

langue d'oc

langue d'oc french

langue d'oil

langue d'oil french

lao people's democratic republic

l'aquila

large yellow lady's slipper

lawson's cedar

lawson's cypress

learner's dictionary

learner's permit

le chatelier's law

le chatelier's principle

lee's birthday

legionnaires' disease