utility pigeons
(chemistry) Used in combination with a known element name (e.g. 'tri-silicon') to designate an unknown element that would reside three periods lower than the known element on a Mendeleev-type perio...
plural of utility pigeon
disease of the sinuses
plural of einkorn
嵐の後、村は冠水した畑を越えて緊急の伝言を届けるために、実用目的で飼育されている鳩に頼った。
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