| 单词 | petrogram |
| 释义 | petrogram in British English (ˈpɛtrəʊˌɡræm) noun a prehistoric pictorial representation done on rock petrogram in American English (ˈpetrəˌɡræm) noun a drawing or painting on rock, esp. one made by a member of a prehistoric people Word origin [petro-1 + -gram1]petro- is a combining form meaning “rock,” “stone,” used in the formation of compound words.Other words that use the affix petro- include: petrochemistry, petrogenesis, petrograph, petrology; -gram is a combining form occurring in loanwords from Greek, where it meant “somethingwritten,” “drawing” (epigram; diagram). On this model, -gram is used in the formation of compound words (oscillogram) |
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