Eucalyptus

ū-kal-ip′tus, n. the 'gum-tree,' a large Australian evergreen, beneficial in destroying the miasma of malarious districts.— ns. Eu′calypt , a eucalyptus; Eucalyp′tol , a volatile, colourle , limpid oil. [Coined from Gr. eu , well, kalyptos , covered— kalyptein , to cover.]