The result is a pale blue luminescence whenever the solution meets blood, which itself is a consequence of a chemical reaction that the blood gives a helping hand to. Here, we look at this reaction â and what horseradish has to do with it. Luminol, known chemically as 5-Amino-2,3-dihydro-1,4-phthalazinedione, isnât used in the CSIâs mysterious spray bottle on its own. Itâs joined by a number of other chemicals which are just as vital for the reaction to take place.
â¢ DISK DRIVE (noun) The noun DISK DRIVE has 1 sense: 1. computer hardware that holds and spins a magnetic or optical disk and reads and writes information on it. Familiarity information: DISK DRIVE used as a noun is very rare.
countable noun. 1  A computer's hard drive is its hard disk, or the part that contains the hard disk. ( 2 on a computer) the mechanism that handles the reading, writing, and storage of data on the hard disk. 3  a computer drive for hard disks, often, specif., such a drive as distinguished from a floppy-disk drive in the same computer.