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• n  a workhorse used as a pack animal

• Originally designed (by Boeing) as a combat plane, Grandpappy long since has been only a packhorse.
• Throughout the Colonies, flourishing circulating libraries and packhorse booksellers spread novels to eager readers, mostly female.
• Crudely he dug out three sacks of ore, trekked them out by packhorse and sent them to the San Francisco Mint.