Sentence:  There are also three ways in which katakana is used for writing "Japanese" words:/ 1 to make words stand out, for example, in advertising: トヨタ (Toyota)/ 2 to classify species of plants and animals, for example in botanical gardens/ 3 to write <WSD>onomatopoeic</WSD> words 
Meaning of the word marked with <WSD> tags:  Having the property of onomatopoeia.