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pentahaloid
pentahaloid adj. (and n.) 
/ˌpɛntəˈhaləʊɪd/, /ˌpɛntəˈheɪlɔɪd/, /ˌpɛn(t)əˈhæˌlɔɪd/ Chemistry rare (of a compound) having five halogen atoms per molecule (also as n.).
Brit. /ˌpɛntəˈhalɔɪd/
, /ˌpɛntəˈhalɔɪd//ˌpɛntəˈhaləʊɪd//ˌpɛntəˈheɪlɔɪd/U.S. /ˌpɛn(t)əˈheɪˌlɔɪd/
, /ˌpɛn(t)əˈheɪˌlɔɪd//ˌpɛn(t)əˈhæˌlɔɪd/ΚΠ
1876 Encycl. Brit. V. 516/2 The compounds containing more than five atoms of halogen behave as mixtures of the pentahaloid compounds with halogens.., they furnish the products of the decomposition by water of the pentahaloid compound, and also the free halogen.
1939 Jrnl. Amer. Chem. Soc. 61 839/1 They reduced the pentahaloids with aluminum powder at about 300° and extracted the residue with dilute acid.
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as lemmas
- quarter-tonal
- quarter-tonality
- quarter-tone
- quarter-track
- quarter-truth
- quarter-turn
- quarter-turning
- quarter-twist belt
- quarter-twist drive
- quarter-tyrant
- quarter-vine
- quarter-voided
- quarter-watch
- quarter-wave
- quarter-wave plate
- quarter-wheeling
- quarter-witted
- quarter-wood
- quarter-yearly
- quarterage
- quarterage bill
- quarterage book
- quarterage day
- quarterage fee
- quarterages