What does "sycamore" mean?

Sycamore: (a) A large tree (Ficus Sycomorus) allied to the common fig. It is found in Egypt and Syria, and is the sycamore, or sycamine, of Scripture. (b) The American plane tree, or buttonwood. (c) A large European species of maple (Acer Pseudo-Platanus). [Written sometimes sycomore.]