> as lemmas
penta-fluoride
penta-fluoride n. 
/ˌpɛntəˈflɔːrʌɪd/, /ˌpɛn(t)əˈflɔˌraɪd/
Brit. /ˌpɛntəˈflʊərʌɪd/
, /ˌpɛntəˈflʊərʌɪd//ˌpɛntəˈflɔːrʌɪd/U.S. /ˌpɛn(t)əˈflʊˌraɪd/
, /ˌpɛn(t)əˈflʊˌraɪd//ˌpɛn(t)əˈflɔˌraɪd/ΚΠ
1872 Philos. Trans. 1871 (Royal Soc.) 161 327 Bromine gradually expels a portion of the fluorine (probably in the form of pentafluoride of bromine) from argentic fluoride in platinum vessels at a red heat.
1922 T. M. Lowry Inorg. Chem. xxxvi. 703 Arsenic pentafluoride, AsF5,..is a colourless gas which condenses at −53° to a yellow liquid.
1994 Sci. News 22 Oct. 261/1 Olah obtained his first results by mixing hydrogen fluoride with antimony pentafluoride to produce a superacid.
<
as lemmas