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microfossil
microfossil n. 
/ˌmʌɪkrə(ʊ)ˈfɒsl/, /ˌmaɪkroʊˈfɑs(ə)l/ Palaeontology a very small fossil; a fossil microorganism.
Brit. /ˈmʌɪkrə(ʊ)ˌfɒsl/
, /ˈmʌɪkrə(ʊ)ˌfɒsl//ˌmʌɪkrə(ʊ)ˈfɒsl/U.S. /ˈmaɪkroʊˌfɑs(ə)l/
, /ˈmaɪkroʊˌfɑs(ə)l//ˌmaɪkroʊˈfɑs(ə)l/ΚΠ
1924 Bull. Amer. Assoc. Petroleum Geologists 8 539 (heading) The value of micro-fossils in petroleum exploration.
1945 M. F. Glaessner Princ. Micropalaeontol. ii. 7 Fossil remains of those groups of organisms whose average representatives do not exceed microscopic size constitute the first and most important category of microfossils.
1991 Amer. Scientist Mar. 135/2 Among the most useful groups for identifying and dating geologic strata are the tiny tooth-like microfossils known as conodont elements.
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as lemmas
- thymylic hydrate
- thyne
- thyne-forth
- thyne-forward
- thyneforth
- thyneforward
- thyratron
- thyratrons
- thyreal
- thyreo
- thyreo-
- thyridia
- thyridium
- thyristor
- thyristors
- thyro
- thyro-
- thyro-antitoxin
- thyro-arytenoid
- thyro-arytenoid folds
- thyro-arytenoid ligaments
- thyro-arytenoid muscles
- thyro-cricoid
- thyro-cricotomy
- thyro-epiglottic