hy po sul phurous

[Pref. hypo-, and Eng. sulphurous.] Chem.: (See the compound.) hyposulphurous-acid, s. Chemistry: 1. H.S02.; by the action of Fe or Zn on sulphurous acid H2S03, contained in a closed ve el, a yellow solution of zinc hyposulphite is obtained. Nearly pure NaHSo2 is obtained by di olving zinc a concentrated solution of acid sodium sulphite, NaHS03. A double salt of zinc and sodium sulphite first crystallizes out, then alcohol is added to precipitate the rest of this salt, and the decanted liquid is placed in a well-corked flask. and colorle needles of sodium hydrogen hyposulphite, NaHSO2, crystallize out. The solution has bleaching properties. The free acid is liberated by oxalic acid, giving an orange solution, which bleaches strongly *2. A name formerly given to thiosulphuric-acid and decomposes the air. (q. v.). hy-pot-ě-nüse, s. [HYPOTHENUSE.] *hy-pot-e-nüş-al, a. [Eng. hypotenus (e); -al .] Of the nature of an hypothenuse; forming an hypothenuse. "If the hypotenusal , or screw be five, the perpendicular or elevation must be three, and the basis four." - Wilkins : Dædal us, ch. xv. hy-pô-thăl-lŭs, s. [Pref. hypo-, and Eng. thal lus. Botany : 1. Delicate filaments constituting the vegetation of coniomycetous fungals. 2. The inferior stratum of the thallus of lichens. hy-poth-ěc, s. [Fr. hypothèque an engagement, a mortgage, a pawning, from Lat. hypotheca , from Gr. hypothēkē (1) an underprop, (2) a pledge, a mortgage; hypo =under, and tithemi to place.] Scots Law : A claim or right, corresponding to a lien in English law, by which the ownership in the effects of a debtor is vested in the creditor, while the effects at the same time remain in the po e ion of the debtor. Thus the furniture and crops of a tenant are subject to the hypothec of the landlord in respect of the current rent. By recent leg is lati on hypothec has been rendered le stringent.