Definition of "crackless" []

• Without crack, seam, or opening.

The Century Dictionary (Public Domain)

• "And on crackless, or largely crackless, climbs where there is little or no possibility of placing protection – on "bold" climbs, as they are known using the same language the Victorian pioneers once used – the acceptance of a very high degree of risk is necessary."
• "A crackhead without money will be a crackless crackhead."
• "I sometime encounter with local and synanthropic, but always eurythermic, Deroceras slugs ended up on a crackless monument, wall etc by morning."