| blindworm | (n) small burrowing legless European lizard with tiny eyes; popularly believed to be blind, Syn. Anguis fragilis, slowworm |
| brittle bladder fern | (n) delicate fern widely distributed in North America and European having thin pinnatifid fronds with brittle stems, Syn. brittle fern, fragile fern, Cystopteris fragilis |
| citrophilous mealybug | (n) destructive especially to citrus, Syn. Pseudococcus fragilis, citrophilus mealybug |
| crack willow | (n) large willow tree with stiff branches that are easily broken, Syn. snap willow, Salix fragilis, brittle willow |
| sand lizard | (n) a common and widely distributed lizard of Europe and central Asia, Syn. Lacerta agilis |