84 
ORNITHOLOGISTS' COMPENDIUM. 
Histol'ogy, n. Minute anatomy. 
Hoar'y (L. al'bms; albescens; canes' cens ; pruino'sns), n. or a. Of a frosty 
gray or silvery hue. 
Holorhi'nal, a. Having the posterior border of the osseous nares rounded. 
( See Sch izorhinal. ) 
Homogen'ity, n. Structural similarity. 
Homoge'neous, a. Of the same character or nature. (Opposite of 
heterogeneous.) 
Homolog'ical, ) a. Structurally related or affined. (Opposite to ana- 
Homol'ogous, ) logical or analogous.) 
Homologonat'ae (L.), n. A primary subdivision of the Order Euripidura, 
proposed by Professor A. H. Garrod. 
Homorogy, n. Structural affinity. (Opposite of analogy, or superficial 
resemblance.) 
Ho'monym, n. A word which in several senses has different meanings. 
As Sylvicola, Swainson, a genus of birds (now called Dendroica) is 
a homonym of Sylvicola, Humphreys, previously applied to a genus of 
mollusks. (Opposite of synonym.) 
Homotyp'ical, a. Of the same structural type. 
Homot'opy, n. A particular kind of homology. 
Hood'ed (L. cuculla'tus), a. Having the head conspicuously different in 
color from the rest of the plumage. 
Hor'notine (L. hornoti'nus), a. or n. A young bird in its first year. 
Hu'meral (L. humera'lis), a. Pertaining to the humerus, or, more 
generally, to the upper arm. 
Hu'merus (L.), n. The upper arm-bone ; or, the whole of the upper 
arm. 
Hy'acinth Blue (L. hyacin'thinus), n. An exceedingly intense purplish 
blue color, similar to but richer than smalt blue. (Schoenf eld's 
"violet ultramarine.") (Plate IX. fig. 5.) 
Hy'brid (L. hgbri'dus), a. or n. The progeny resulting from sexual inter- 
course of distinct species. 
Hybridization, n. Production of hybrids. 
Hy'bridize, a. To cross and bear offspring which unite the characters 
of two species. 
Hye'mal (L. hiema'lis), a. Pertaining to winter. 
Hy'oid, a. Properly, pertaining to the os hyoides, or tongue-bone, but 
frequently applied with reference to the tongue itself. 
Hyperbo'rean (L. hyperbo'reus), a. Pertaining to the extreme North. 
Hyperchrom'atism, n. State of highly increased brightness or intensity 
of coloration, or excess of pigment. 
Hyper'trophy, n. Unusual development of a part or organ. (Opposite 
of atrophy.) 
Hypochon'driis, ) (L. ; pi. hypochon'dria). The flanks. (Used chiefly 
Hypochon'drium, ) in the plural.) (See plate XI.) 
Hypochondriac (L. hypochondria 'cus), a. Pertaining to the flanks. 
Hypognath'ous, a. Having the maxilla, or lower mandible, longer than 
the mandible, as in the Skimmers (Rhynchops). 
