Medical Definition of NEOLOGISM. 1. : a new word, usage, or expression. 2. : a word coined by a psychotic that is meaningless except to the coiner.ull Definition of NEOLOGISM. 1. : a new word, usage, or expression. 2. psychology: a new word that is coined especially by a person affected with schizophrenia and is meaningless except to the coiner. â neÂ·olÂ·oÂ·gisÂ·tic \-Ëae-ËÃ¤-lÉ-Ëjis\ tik. adjective
What is black spot? Black spot is the most serious disease of roses. It is caused by a fungus, Diplocarpon rosae, which infects the leaves and greatly reduces plant vigour. Expect to see leaf markings from spring, which will persist as long as the leaves remain on the plant. The fungus is genetically very diverse and new strains arise rapidly.
Alice Aks - CA, Zone 9. After reading all of the above, I was going to mention temperature changes. Here in my colder climate, I get some red rose petals that have that black edge on them. Most of the time it is due to a light frost that gets on the roses on some cold evenings. The edges of the petals get frost bitten and look black and disfigured a bit. How heavy a frost and the timing can cause more of the black edges too. Stan the Roseman Bearrose1954 - Colorado, Zone 5.