Noun
One of the movable peduncles which, in the decapod Crustacea, bear the eyes at the tip.
Source: Webster's dictionaryThey are organised into different roles (drone, scientist, strategists, supreme and eternal), which are identifiable with colour-coded armour instead of the identification plates under the eyestalk used by their predecessors. Source: Internet
Their main weakness is their eyestalk; attacks upon them using various weapons can blind a Dalek, making it go mad. Source: Internet
These Dalek casings use a short operator inside the housing while the 'head' and eyestalk are operated via remote control. Source: Internet
This problem has largely been eradicated with the advent of the "new series" version, as its remotely controlled dome and eyestalk allow the operator to concentrate on the smooth movement of the Dalek and its arms. Source: Internet