assistant

adj. serving as an aid, helpful, auxiliary

n. helper, one who aids

An assistant is a person or electronic tool who or that helps another person with his or her work.A right-hand man is a kind of assistant, male or female, relied upon heavily by another. The term comes from the importance of the right hand in performing tasks (since most people are right-handed). There is speculation that "right-hand man" also comes from the idea of a king with his advisor sitting on his right side, but there is little evidence supporting it.
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Noun
1. a person who contributes to the fulfillment of a need or furtherance of an effort or purpose; "my invaluable assistant"; "they hired additional help to finish the work"
(synonym) helper, help, supporter
(hypernym) worker
(hyponym) coadjutor
(derivation) help, assist, aid
Adjective
1. of or relating to a person who is subordinate to another
(synonym) adjunct
(similar) subordinate, low-level

adj. ancillary; aid, hand driven; conducive, contributory

n. assistant, aide, help, helper; helpmate, tutor

v. assist; be in attendance, present; participate, sit in

(n.)
One who, or that which, assists; a helper; an auxiliary; a means of help.
  

(n.)
An attendant; one who is present.
  

(a.)
Of the second grade in the staff of the army; as, an assistant surgeon.
  

(a.)
Helping; lending aid or support; auxiliary.