seselinidæ

pl. [Lat. sesel ( i ); fem. pl. Botany: A family of Apiaceae. (Umbellifere.) (Lindley.) sẽ sĩ ạ, s. [Mod. Lat., from Gr. sēs =a moth. ( Brande.)] Entom .: The typical genus of Sesiidæ (q. v.). se-si-i-dæ, s. pl . [Mod. Lat. sesi ( a ); Lat. fem. pl. adj. sutf. -idœ .] Entom.: A family of Sphingina. Antennæ much thickened beyond the middle, ending in a hooked bristle; wings short, broad; abdomen thick, with a broad tuft at the tip (whence Swains on calls them Brush-tipped). Larva long, smooth, with a horn rising upward from the twelfth segment. Pupa on the ground among leaves. ( Stainton .) sěş-lër-I-a, s . [Named after Sesler, an Italian botanist.] Bot.: Moor-gra , a genus of Bromide. Panicle spiked, rounded or slightly unilateral; spikelets se ile, laterally compre ed, with two or more perfect florets; empty glumes two, longer than the flowering ones, generally one-nerved; scales two to five toothed. Known species eight. = ses-qui-, pref . [Lat. = semisqui ; semis a half, and quique and.] A prefix denoting one integer and a half; as, sesquicyathus=a cyathus and a half. It is used in: 1. Chem.: To denote that two atoms of a metal were combined with three atoms of oxygen or other non-metallic element; as thus, sesquioxide of iron, Fe2O3, now called ferric oxide; sesquisulphide of iron, or ferric sulphide, Fe2S3, . This definition does not hold good unle the valency of the metal is taken into consideration. Thus sesquichloride of iron is Fe2Cl6, the iron being quadrivalent, while sesquichloride of antimony is SbCl3, the antimony being trivalent. +2. Geom.: To expre a ratio in which the greater term contains the le once, and leaves a certain aliquot part of the le one. 13. Music : To signify a whole and a half; as, ses qui alter a, sesquiterza , .