1. noun
Archegonia are surrounded early in their development by the juvenile perianth, through the slender beak of which the elongated neck of the fertilized archegonium protrudes.
b) The corresponding part in some other anatomical contexts.
2. verb
Alan and Betty were necking in the back of a car when Bettys dad caught them.
In the dim light, punters sit sipping raspberry-flavoured Tokyo martinis, losing the freestyle sushi off their chopsticks or necking Asahi beer.
Wikipedia foundation.