prerequisite something that is needed or obligatory in advance
barium peroxide a white toxic powder obtained by heating barium oxide in air
barium hydroxide white poisonous crystals
parametritis inflammation of connective tissue adjacent to the uterus
permutableness ability to change sequence
prerogative a right reserved exclusively by a person or group
prematureness the state of being premature
Permian period from 280 million to 230 million years ago; reptiles
Bermuda shorts short pants that end at the knee
perquisite an incidental benefit for certain types of employment
order Equisetales lower tracheophytes in existence since the Devonian
permutability ability to change sequence
order Primates an animal order including lemurs and tarsiers and monkeys and apes and human beings
chamber orchestra small orchestra; usually plays classical music
parametric statistic any statistic computed by procedures that assume the data were drawn from a particular distribution
permafrost ground that is permanently frozen
spermatogenesis development of spermatozoa
white prairie aster perennial of western North America having white flowers
perboric acid a form of boric acid
formidable extremely impressive in strength or excellence