gram-, -gram-, -gram, -grammatic, -grammatical, -grammatically, -gramme, -grammic +

(Greek: write, writing, something written, a written record, a recording; letters; words; later, a small weight, a unit of mass in the metric system)

A unit of weight in the metric system from 1797 gramme, borrowing of French gramme, from Late Latin gramma, "small weight"; from Greek gramma, "small weight"; originally, "something written"; from the stem of graphein, "to draw, to write".

—Compiled from information located in;
The Barnhart Dictionary of Etymology; Robert K. Barnhart, Editor;
The H.W. Wilson Company; New York; 1988; page 445.
chronogram
1. A phrase, sentence, or inscription, in which certain letters (usually distinguished by size or otherwise from the rest) express by their numerical values a date or epoch.
2. An inscription, sentence, or phrase in which certain numeral letters, usually made especially conspicuous to express a particular date or epoch on being added together; as in: Man of sCience and huManity, Bertrand RusselL’s eXample gIves life eXtra meaning = MCMLXIX or 1969, the year of Bertrand Russell’s death.
3. In horology, the record produced by an instrument that records time intervals; such as, the duration of an event.
chronogrammatic
cladogram
1. A tree-like diagram (dendrogram) illustrating the evolutionary descent of any group of organisms.
2. An evolutionary tree diagram with groups arranged by branch points to show their relative relationships.

Groups that are closer together share a more recent common ancestor than those which are farther apart.

3. A diagram, resulting from a cladistic analysis, which depicts a hypothetical branching sequence of lineages leading to the taxa (category of organisms) under consideration.

The points of branching within a cladogram are called nodes. All taxa occur at the endpoints of the cladogram.

colonogram
A graphic recording of movements of the colon.
coronary sinus electrogram (s) (noun), coronary sinus electrograms (pl)
An intracardiac electrogram which records electrical potentials within the coronary sinus: A coronary sinus electrogram is used for the indirect monitoring of the left ventricular hollow parts or cavities in an organ or in each of the two main chambers of the heart, left and right.
coronogram (s) (noun), coronograms (pl)
A photograph of the bright ring of light around the sun when it is shining.
cryptogram (s) (noun), cryptograms (pl)
1. A piece of secret writing; anything written in cipher, or in such a form or order that a key is required in order to know how to understand and put the letters together.
2. A written code in which the letters of a text of a communication are replaced with others according to a secret system.
cryptogramic
A reference something that has been written in code or cipher.
cryptogrammatic
1. Referring to a symbol with a secret meaning or significance.
2. Descriptive of a message, text, or communication written so as to conceal its meaning with the use of some form of code.
cryptograph (s) (noun), cryptographs (pl)
1. A message or writing in code or cipher.
2. A machine for writing or deciphering encoded messages.
crystallogram
A photograph produced when X-rays are diffracted by a crystal.
cystogram
Radiographic demonstration of the bladder filled with contrast medium.
cystometrogram
A graphic recording of urinary bladder pressure at various volumes.
dacryocystogram
A radiograph of the lacrimal apparatus obtained (after injection of radiopaque substances) for the purpose of determining the presence of and localizing a site of obstruction; this procedure has been largely replaced by the CT and MRI.
dactylogram
A fingerprint.

Related "writing" word units: glypto-; graph-; scrib-, script-.