ghost weed ghost·weed uncommon noun 1. annual spurge of western United States having showy white-bracted flower clusters and very poisonous milk Synonymssnow-on-the-mountainsnow-in-summerghost weedEuphorbia marginata Related words Broader terms spurge Parts Euphorbia WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
