sedimentary rocks Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition plural noun. rocks formed by layers of sediments pressed together over time. Example Sentence You can often find fossils in sedimentary rocks. More Example Sentences They are often found near water sources. Synonyms sandstone; limestone; shale Antonyms igneous rocks; metamorphic rocks Hear It! Say It! Write It! sedimentary rocks Switch to cursive Start Share with your friends: