Johannsen Jo·hann·sen (yō-hän'sən), Wilhelm Ludwig. 1857—1927.
Danish botanist and geneticist who was a pioneer in the field of experimental genetics.
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| a scrap or morsel of food left at a meal. |
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