||Gyr`en*ceph"a*la (jr`n*sf"*l), n. pl. [NL. fr. Gr. gyro`s round +
||'egke`falos the brain.] (Zoˆl.) The higher orders of Mammalia, in
||which the cerebrum is convoluted. -- Gyr`en*ceph"a*lous (-ls), a.
Gyr"fal`con (jr"f`k'n), n. [OE. gerfaucon, OF. gerfaucon, LL.
gyrofalco, perh. fr. L. gyrus circle + falco falcon, and named from its
circling flight; or cf. E. gier-eagle. See Gyre, n., Falcon.] (Zoˆl.)
One of several species and varieties of large Arctic falcons, esp.
Falco rusticolus and the white species F. Islandicus, both of which are
circumpolar. The black and the gray are varieties of the former. See
Illust. of Accipiter. [Written also gerfalcon, gierfalcon, and
jerfalcon.]
||Gy"ri (j"r), n. pl. See Gyrus.