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A sign for a round vessel with a long downward-bent neck.
Also known as: Retort sign, Cucurbit
A bulb with a long neck angled downward, used to distil without a separate still-head. The shape is the standard visual shorthand for a chemist at work in illustration.
Denotes a retort, a round-bodied vessel with a long neck bent downward, in which a substance can be heated and its vapour led directly away to condense.
A circle forming a round bulb, with a long neck curving downward and away from one side.
A retort performs distillation without a separate still-head.