drying rock n. a rock in the sea whose exposed surface at low tide is used as a marker for surveying or establishing legal boundaries. Also low-tide elevation. (source: Double-Tongued Dictionary)
Further reading
How do you transform ancient Chinese script for use in the modern age? English uses a keyboard with just 26 letters, but the first Chinese typewriter looked like a small table under a huge disk with more than 4,000 characters. A new book chronicles...
If you’re ever near a sundial, step closer and look for a message. Many sundials bear haunting, poetic inscriptions about the brevity of life. Plus, language development in toddlers: why and how little ones pick up the exclamation Uh-oh...