one man
one marker
one market
one measure
one measurement
one mechanism
one medication
one member
one method

one methyl group
one might
one minute
one model
one molecule
one monolayer
one monomer
one month
one mutation
one neonate

one night
one nucleus
one object
one observed
one observer
one obtained
one occasion
one operation
one order
one organ

one organization
one outcome
one pair
one parameter
one parent
one part
one participant
one partner
one party
one pass

one patient
one patient group
one pattern
one peak