![test-tube noun - Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com test-tube noun - Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com](https://www.oxfordlearnersdictionaries.com/us/media/english/fullsize/l/lab/labor/laboratory_equipment.png)
test-tube noun - Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com
![tube noun - Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com tube noun - Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com](https://www.oxfordlearnersdictionaries.com/media/english/fullsize/i/int/inter/internal_organs.png)
tube noun - Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com
![Amazon.com: (Pink) Toobaloo Auditory Feedback Phone – Accelerate Reading Fluency, Comprehension and Pronunciation with a Reading Phone. : Office Products Amazon.com: (Pink) Toobaloo Auditory Feedback Phone – Accelerate Reading Fluency, Comprehension and Pronunciation with a Reading Phone. : Office Products](https://images-na.ssl-images-amazon.com/images/I/51PgiKWYmdL._AC_UL600_SR600,600_.jpg)
Amazon.com: (Pink) Toobaloo Auditory Feedback Phone – Accelerate Reading Fluency, Comprehension and Pronunciation with a Reading Phone. : Office Products
![cylinder noun - Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com cylinder noun - Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com](https://www.oxfordlearnersdictionaries.com/media/english/fullsize/s/sol/solid/solids.png)
cylinder noun - Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com
![Stream French pronunciation for "Ceci n'est pas une pipe" by Arte Literatura | Listen online for free on SoundCloud Stream French pronunciation for "Ceci n'est pas une pipe" by Arte Literatura | Listen online for free on SoundCloud](https://i1.sndcdn.com/artworks-000119408252-qmymbm-t500x500.jpg)