The gasworks in the 19th century produced a crude form of natural gas for gaslight street lamps using coal gasification methods.

To form the past adverbial participle of a verb that ends in any vowel but, add the suffix to the crude form of the verb.

This means that 5% of the proteins produced are larger than and different from the others normally produced, which can be thought of as a crude form of transcriptional regulation.

This depends upon very crude forms of artificial intelligence that perform reconfiguration by obeying specific rules.

The penny papers represented the crudest form of journalism because of the sensational gossip that was reported.