hhd.

Noun

hogshead (plural hogsheads)

1. (UK) A cask of a certain size; its volume used as a measure of capacity for liquids, containing 63 wine gallons, or about 52+¹⁄₂ imperial gallons (a half pipe).
   • [...] their vessels for use are made some of clay, of which sort some are so great as that they will containe more then one hogshead of water.1632, attributed to J. Day, A Pvblication of Gviana’s Plantation: […], London: Printed by William Iones for Thomas Paine, […], →OCLC, page 15

   Synonyms:

   hhd.

2. A large barrel or cask of indefinite contents, especially one containing from 100 to 140 gallons.
   • [...] Now the Shippe boaring the Moone with her maine Maſt, and anon ſwallowed with yeſt and froth, as you'ld thruſt a Corke into a hogſhead.c. 1610–1611 (date written), William Shakespeare, “The Winters Tale”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount...