The liquid that has been condensed from vapour during distillation; normally a purified form or a fraction of an original liquid.
The essence of something.
Diesel fuel.
With a nuclear bomb, the process of going from subcritical to prompt critical.
The distal end of attachment of a muscle to a bone that will be moved by the muscle.
The act of inserting, or something inserted.
The addition of a nucleotide to a chromosome by mutation.