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(historical units of measure, archaic) Alternative form of omer: a former Hebrew unit of dry volume equal to about 2.3 L or 2.1 quarts.
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A conical chamber at the breech of the bore in heavy ordnance, especially in mortars.
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(slang, derogatory) A stupid, awkward, or oafish person.
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(US, military slang, derogatory) An inept trainee or serviceperson.
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(US, military slang) An opponent in combat or in training.
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(medical slang, derogatory) An undesirable hospital patient, or a patient who does not need medical care.
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(slang, derogatory) A dirty, senile, or otherwise unpleasant patient.
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(slang, informal) A patient who does not respond to medical treatment.