noun

• (cooking, dated) Meat or fish that has been scored and broiled.
  "Take it vp Villain, and eat it, or I will make thee ſlice the brawnes of thy armes into carbonadoes, and eat them."

verb

• (transitive, dated, also figuratively) To make a carbonado of; to score and broil.
  "Now for the manner of Carbonadoing it is in this ſort, you ſhall firſt take the meate you muſt Carbonadoe and ſcorche it both aboue and belowe; then ſprinkle good ſtore of ſalt vpon it, and baſte it all ouer with ſweet butter melted, […]"
• (transitive, obsolete) To cut or hack, as in combat.
  "Draw you raſcall, you bring letters againſt the King, and take Vanitie the puppets part, againſt the royaltie of her father, draw you rogue or ile ſo carbonado your shankes, […]"

noun

• (mineralogy) A dark, non-transparent, impure form of polycrystalline diamond (also containing graphite and amorphous carbon) used in drilling.
  "At present, equal attention is paid to irregular fragments of a blackish or greyish colour, occasionally of considerable size, also yielded by the washings of diamandiferous sand, which formerly passed unregarded. These fragments are now carefully colected, and have acquired some considerable value in commerce, where they are known under the name of carbonado or carbon. […] An examination of these numerous varieties has made it evident that between carbonado of a simply micro-crystalline texture, and the diamond regularly crystallised in diaphanous octahedrons, there exists an uninterrupted series of intermediate conditions."