n.1.The lid or cover of a pot.
Potlid valve
a valve covering a round hole or the end of a pipe or pump barrel, resembling a potlid in form.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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References in periodicals archive ?
The appearance of Ambidexter ('Enter the Vice with an olde Capcase on his hed, an olde pail about his hips for harness, a Scummer and a potlid by his side and a rake on his shoulder', Cambises stage direction after 125) would presumably have produced at least a smile from most members of the audience.
non-artefactual objects with thermal shattering such as potlid scars and/or crenated fractures that superficially look similar to backed artefacts in plan shape;