jpdb beta

scarce; rare

rare; uncommon

uncommon; rare; extraordinary; matchless

dilute sulfuric acid; dilute sulphuric acid

rare book

rare; uncommon

dilute hydrochloric acid

noble gas; I get the feeling that ...; I think that ...

rare earth

rare sugar

Greek (language)

dilute nitric acid

unusual; rare

rare element

rare species

dilute acid