acceleration of a chemical reaction induced the presence of material that is chemically unchanged at the end of the reaction; "of the top 50 commodity chemicals, 30 are created directly by catalysis and another 6 are made from raw materials that are catalytically produced"
the process of ionizing; the formation of ions by separating atoms or molecules or radicals or by adding or subtracting electrons from atoms by strong electric fields in a gas
the condition of being dissociated into ions (as by heat or radiation or chemical reaction or electrical discharge); "the ionization of a gas"
a small bar of metal across the fingerboard of a musical instrument; when the string is stopped by a finger at the metal bar it will produce a note of the desired pitch
an ornamental pattern consisting of repeated vertical and horizontal lines (often in relief); "there was a simple fret at the top of the walls"
agitation resulting from active worry; "don't get in a stew"; "he's in a sweat about exams"
wear away or erode
decorate with an interlaced design
carve a pattern into
be agitated or irritated; "don't fret over these small details"
cause annoyance in
provide (a musical instrument) with frets; "fret a guitar"
sports equipment consisting of an object set up for a marksman or archer to aim at
a reference point to shoot at; "his arrow hit the mark"
the location of the target that is to be hit
intend (something) to move towards a certain goal; "He aimed his fists towards his opponent's face"; "criticism directed at her superior"; "direct your anger towards others, not towards yourself"
very lively and profitable; "flourishing businesses"; "a palmy time for stockbrokers"; "a prosperous new business"; "doing a roaring trade"; "a thriving tourist center"; "did a thriving business in orchids"