preseed

Verb

 * 1) To seed in advance.
 * 2) * I loaned them the valve that they used to seed the clouds or preseed them with liquid nitrate solution
 * 1) * I loaned them the valve that they used to seed the clouds or preseed them with liquid nitrate solution

Noun

 * 1)  A medium specially prepared for a seeding operation.

Adjective

 * 1) Before a seeding or seed stage of development.