Definitions

1. adjective

Having a structure or pattern of crinoids (a group of marine animals with a star-shaped body and long, thin stem).

“The crinoidal limestone was formed from the remains of ancient sea creatures.”

2. adjective

Having a branching or star-shaped structure, especially one resembling the body of a crinoid.

“The crinoidal pattern on the rock surface was a result of millions of years of erosion.”

3. noun

A rock or stone that is composed of or resembles the remains of crinoids, often found in limestone or other sedimentary rocks.

“The geologist collected a sample of crinoidal rock from the excavation site.”

4. noun

A fossil or impression of a crinoid, especially one found in rock or stone.

“The museum displayed a crinoidal fossil found in the ancient sea bed.”