"Pseudotsuga macrocarpa" sunan kimiyya ne ga nau'in bishiyar da aka fi sani da Bigcone Douglas-fir. Kalmar "Pseudotsuga" ta samo asali ne daga kalmomin Helenanci "pseudes" ma'ana "karya" da "tsuga" ma'ana "hemlock", yana nufin kamancen itace da nau'in hemlock. "Macrocarpa" ya fito ne daga kalmomin Helenanci "makros" ma'ana "manyan" da "karpos" ma'ana "'ya'yan itace", yana nufin manyan cones da wannan nau'in bishiya ke samarwa.