tending or intended to correct or counteract or restore to a normal condition; "corrective measures"; "corrective lenses"
designed to promote discipline; "the teacher's action was corrective rather than instructional"; "disciplinal measures"; "the mother was stern and disciplinary"
any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
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"