Eucalyptus terrica is a tree that typically grows to a height of and forms a
lignotuber. It has thin, rough, fibrous bark on the trunk, sometimes also on the larger branches, smooth grey to brown bark above. Young plants and
coppice regrowth have dull greyish, narrow lance-shaped leaves that are arranged alternately, long and wide. Adult leaves are the same shade of dull green to greyish on both sides, narrow lance-shaped to lance-shaped, long and wide, tapering to a
petiole long. The flower buds are arranged in leaf
axils in groups of seven on an unbranched
peduncle long, the individual buds on
pedicels long. Mature buds are oval, creamy yellow, long and wide with a conical to horn-shaped
operculum that is longer than the
floral cup. Flowering occurs from September to October and the flowers are white. The fruit is a woody, hemispherical
capsule long and wide with the valves prominently protruding. ==Taxonomy and naming==