| mayfly | (n) slender insect with delicate membranous wings having an aquatic larval stage and terrestrial adult stage usually lasting less than two days, Syn. dayfly, shadfly |
| whitlow grass | (n) annual weed of Europe and North America having a rosette of basal leaves and tiny flowers followed by oblong seed capsules, Syn. shad-flower, Draba verna, shadflower |