1. A hydrogen atom in an acid that forms a positive ion when the acid dissociates
   - acid hydrogen

Type of: hydrogen atom

• cross-country jumping
• cross-country riding
• cross-country skiing
• cross-cultural
• cross-division
• cross-dress
• cross-dresser
• cross-examination
• cross-examine
• cross-examiner
• cross-eye
• cross-eyed
• cross-fertilisation
• cross-fertilise
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• cross-file
• Cross-Florida Waterway
• cross-grained
• cross-index
• cross-leaved heath
• cross-legged
• cross-linguistic
• cross-linguistically
• cross-link