language
GMAT TOEIC IELTS TOEFL

TOEFL® Vocabulary Practice

Find out how TOEFL Tutor can help you achieve your target score

definition: 
Produce and discharge (something, especially gas or radiation)
sentence: 
The intensity of the electromagnetic radiation emitted by a source varies as a function of both frequency and direction.
difficulty: 
easy
toefl frequency: 
2
toefl classification: