| a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question. |
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
morgan mor·gan (môr'gən)
n.
Abbr. M A unit for expressing the relative distance between genes on a chromosome based on the frequency with which the genes cross over; one unit equals a theoretical crossover value of 100 percent between two loci.
Morgan Mor·gan (môr'gən), Thomas Hunt. 1866-1945.
American biologist. He won a 1933 Nobel Prize for establishing the chromosome theory of heredity by his studies of the fruit fly Drosophila.
| Morgan (môr'gən) Pronunciation Key
American zoologist whose experiments with fruit flies demonstrated that hereditary traits are carried by genes on chromosomes and that traits can cross over from one chromosome to another. He was awarded the Nobel Prize for physiology or medicine in 1933. |