Question

What is hydrophilic moiety in 'absorption and movement of water in plants' ?

Answer 1

A moiety is basically a distinct part of a large molecule. I'll use phospholipids as an example. 

A phospholipid has two main parts: a hydrophilic moiety, its head, and a hydrophobic moiety, its pair of tails. 

The hydrophilic head is attracted to water. Hydrophilic means water loving. 

The hydrophobic tails repel water. Hydrophobic means water fearing. These tails end up on the inside of a cell membrane, away from water.