The system of mingling the words, use simple present tense of the verb after the term, the verb must agree with the subject, the noun and the term being defined must agree in number, be specific about the class, use the same part of speech for the class as the term being defined, whenever possible, don't use the same wordings for the term and the class or distinguishable characteristics, make sure there is enough information in the adjective clause to distinguish other members of the class, the distinguishing characteristics may be introduced in several ways using relative pronouns (that, wherein, whose, what, which, when, who, where, whoever, by which), using past participle (formed with the -ed, -d, -en form of the verb), using present participle phrase (formed with the -ing form of the verb), using infinitive phrase (to + verb), rules of reducing adjective clauses, etc.