grapho-, graph-, -graph, -graphy, -grapher, -graphia

A system devised to help children learn to read.

1. Radiographical study and measurement of the fetal head and the maternal pelvic outlet.
2. Measurement of the size of the fetal head and of the birth canal from suitable radiographs of the pelvis of a pregnant woman.

Roentgenography of the pelvic viscera, usually after the injection of a gas: such as nitrous oxide or carbon dioxide, into the pelvis.

A roentgenogram obtained during pelviroentgenography.

A careless or inaccurate delineation (representing, portraying, or describing, as by lines, diagrams, sketches, etc.) of anything.

A classification of rock textures and their mineralogical relationships by using microscopic examinations: While Sam was studying the elements of rocks, he found descriptions of petrographs in a special book about geology which provided a better understanding.

Someone who compiles descriptions and the systematic classifications of rocks: Not only does a petrographer classify granite, diamonds, boulders, etc., but he or she also tries to find out why concrete cracks!

A reference to the descriptions and classifications of rocks: Petrographic procedures are used in laboratory examinations of marble, for example, by using acid, an electromagnet, and chemical analysis.

Relating to the branch of the study of stones and rocks dealing with the descriptions and classifications of rocks; especially, by microscopic examinations: Manual used the petrographical data he had gathered in his research on lava and obsidian to complete the final examination paper for his geology class.

Characterizing how minerals are identified in thin-sections with the use of a special microscope and polarized light: During his course in geology, Steven learned how to petrographically classify inorganic substances by using a special optical instrument which enlarged the material several hundred times.