Learn how to say Eucalypts correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word eucalyptus:
noun (plural eucalyptuses or eucalypti /-tʌɪ/)
a fast-growing evergreen Australasian tree that has been widely introduced elsewhere. It is valued for its timber, oil, gum, resin, and as an ornamental tree. Also called gum1, gum tree.
Genus Eucalyptus, family Myrtaceae: numerous species
(also eucalyptus oil) [mass noun] the oil from eucalyptus leaves, chiefly used for its medicinal properties.
modern Latin, from Greek eu ‘well’ + kaluptos ‘covered’ (from kaluptein ‘to cover’), because the unopened flower is protected by a cap