(nautical) a horn on a floating mine which, upon contact, releases an electrolyte that makes an electrical connection and initiates the explosion

(chemistry) the study of the reaction rates of chemical reactions, especially as a means of elucidating reaction pathways or mechanisms

(chemistry) the unique combination of analytical results from a number of techniques that identifies a particular compound in a sample

any laser that obtains its energy from a chemical reaction

any cosmetic preparation designed to remove hair from the skin

(chemistry) any substance used to classify another, often by changing colour

Any symptom, such as erythema, edema, and vesiculation, caused by exposure of the skin to a chemical compound.

The study of the chemistry of the oceans.

Any compound that serves to transmit a message.

(chemistry) the fragmentation of any compound into elements or smaller compounds