Definition of crawlboard in English:

crawlboard

Line breaks: crawl|board
Pronunciation: /ˈkrɔːlbɔːd/

Entry from British & World English dictionary

noun

A board used as a means of access to a confined space.

Definition of crawlboard in:

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Word of the day retroflex
Pronunciation: ˈrɛtrə(ʊ)flɛks
adjective
turned backwards