- Learn English
-
Learn grammar
-
List of words
-
Study your cards
-
Hang On, Man!
-
Audio Books
-
More apps
- Recent searches
-
flight attendant
-
67
-
twinge
-
manganese
-
acotyledon
-
oaf
-
helen
-
whirligig
-
canaan
-
agonus
- Hide translation
tropism
tropism /ˈtroʊpɪzəm/
noun
-
An involuntary orienting response; positive or negative reaction to a stimulus source
(
tropism
)
an involuntary orienting response; positive or negative reaction to a stimulus source