sclerophyll
Concise Oxford English Dictionary © 2008 Oxford University Press:
sclerophyll /ˈsklɪərəfɪl, ˈsklɛ-/
▶noun Botany a woody plant with evergreen leaves that are tough and thick in order to reduce water loss.
– derivatives
sclerophyllous /-ˈrɒfɪləs/ adjective.
sclerophyllous /-ˈrɒfɪləs/ adjective.
– origin early 20th cent.: from Gk sklēros ‘hard’ + phullon ‘leaf’.
'sclerophyll' also found in these Oxford entries:

