Definition of "hyd" []

• Abbreviations of hydraulics. (noun)
• Abbreviations of hydrostatics. (noun)

The Century Dictionary (Public Domain)

• "Turning to see who had "accidentally" nudged me ... well I won't name any names; suffice to say the culprit is yma o hyd."
• "D2's my baby - tested propulsion/hyd systems on pretty much all of them. you"
• "The DYDA DISPATCHES: Yma o hyd skip to main | skip to sidebar"