synthetic shuttlecock
/sɪnθˈɛtɪk ˈʃʌtəlkˌɒk/
n
中文：塑料羽毛球
Meaning：Small plastic cone that is sturdier than the feathered shuttlecock and is usually used for training; it weighs between 4.74 and 5.5 g, the same as the feathered shuttlecock.