Simple past tense and past participle of specialise.(verb)
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Use "specialised" in a sentence
"At the same time, some Yugoslav publishers begun publishing SF books in specialised editions."
"Finally, the question as to whether coursebooks will incorporate corpus-based tasks — I see this developing first in specialised language areas such as English for Academic Purposes or English for Legal Purposes."
"Probing a dictionary like the OED would be a start, but even that fine database only has a proportion of the highly technical terms and senses found in English specialised dictionaries."