
1) Ancient Egyptian technology 2) Archaeological artefact type 3) Type of Inscription
Found on
https://www.crosswordclues.com/clue/ostracon

An ostracon (Greek: ὄστρακον ostrakon, plural ὄστρακα ostraka) is a piece of pottery (or stone), usually broken off from a vase or other earthenware vessel. In archaeology, ostraca may contain scratched-in words or other forms of writing which may give clues as to the time when the piece was in use. In Athens, the voting public wo...
Found on
http://en.wikipedia.org/wiki/Ostracon
[journal] The Ostracon is an academic journal published by the Egyptian Study Society of Denver, Colorado. It publishes research by professionals and by Society members into the art, archaeology, languages, history, and social systems of the Egyptian people. == See also == ...
Found on
http://en.wikipedia.org/wiki/Ostracon_(journal)

potshard or limestone flake used in antiquity, especially by the ancient Egyptians, Greeks, and Hebrews, as a surface for drawings or sketches, or ...
Found on
http://www.britannica.com/eb/a-z/o/37

In ancient Egypt, a piece of limestone or pottery used as a cheap alternative to
papyrus. It was also used for voting tablets in Athens. ...
Found on
http://www.encyclo.co.uk/local/20688

From the Greek word meaning; 'potsherd'. A chip or shard of limestone or pottery used as a writing tablet. Ostraca are known from all periods. but 19th and 20th-Dynasty examples are the most common. The texts can be anything from a simple shopping list to drafts of hieroglyphic inscriptions.
Found on
https://www.encyclo.co.uk/local/10138

(in ancient Greece) a potsherd, esp. one used as a ballot on which the name of a person voted to be ostracized was inscribed.
Found on
https://www.infoplease.com/dictionary/ostracon
No exact match found.