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.
How to Prevent Black Spot. With the right gardening habits in place, you can keep black spot at bay on your roses by: 1  Water in the Morning: This allows the moisture to evaporate from the leaves.  Avoid Watering Foliage: Especially if the weather is warm and humid, avoid getting the foliage wet when watering.