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nounsmall genus of highly toxic biennials: hemlock
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Definition that contains conium
- hemlock poisonous drug derived from an Eurasian plant of the genus Conium
- zircon a common mineral occurring in small crystals; chief source of zirconium; used as a refractory when opaque and as a gem when transparent
- hf a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons
- hafnium a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons
- zirconium silicate a common mineral occurring in small crystals; chief source of zirconium; used as a refractory when opaque and as a gem when transparent
- baddeleyite a mineral consisting of zirconium oxide
- atomic number 72 a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons
- conima a gum resin from the poison hemlock, Conium maculatum