cribriform Syllabification: (crib·ri·form)Pronunciation: /ˈkribrəˌfôrm/Definition of cribriform adjective Anatomy denoting an anatomical structure that is pierced by numerous small holes, in particular the plate of the ethmoid bone through which the olfactory nerves pass. Origin: mid 18th century: from Latin cribrum 'sieve' + -iformcribriform in other Oxford dictionaries Definition of cribriform in the British & World English dictionary