turtleneck

1 ENTRIES FOUND:
turtleneck /ˈtɚtl̟ˌnɛk/ noun
plural turtlenecks
turtleneck
/ˈtɚtl̟ˌnɛk/
noun
plural turtlenecks
Britannica Dictionary definition of TURTLENECK
[count]
1 
US : a high collar that covers most of your neck even when the collar is folded over itself
also : a knit shirt or sweater with this kind of collar
— called also (British) polo neck
— see color picture on this page
2 
British : mock turtleneck