lancet: a surgical knife with a pointed double-edged blade; used for punctures and small incisions
surgical knife: a very sharp knife used in surgery
welwitschia: curious plant of arid regions of southwestern Africa having a yard-high and yard-wide trunk like a turnip with a deep taproot and two large persistent woody straplike leaves growing from the base; living relic of a flora long disappeared; some may be 700-5000 years old