HELIOTROPIUM 



161 



HEMIDACTYLUS 



Heliotropium, (he-li-o-tro'pi-um). [Gk. helios, 

 son; trope, turning.] Heliptrope=Turnsole: 

 a plant belonging to Ehretiaceae. 



Helium, (he'li-um). [Gk. helios, sun.] An 

 hypothetical elementary substance present 

 in the solar prominences. 



Helix, (he'liks). [L. helix, ivy.] l.=Snail: 

 a molluscous animal, belonging to Helicida?, 

 named from the spiral forni of its shell ; fos- 

 sil remains of many species are found iu 

 Tertiary rocks. H. pomatia: garden snail. 

 2. A spiral, named from the resemblance to 

 the growth of ivy. 



Helladotherium, (hel-la-dd-the'ri-um). [Gk. 

 Hellas, Greece; therion, beast.] An animal, in- 

 termediate between the giraffe and deer, 

 found fossil in the Miocene rock of Pikermi. 



Hellebore, (hel'le-bor). (Helleboros, the Greek 

 name.] = Helleborus = Bear's foot: a rough 

 herb belonging to Ranunculaceae. Slack H. 

 =Christraas rose. White H. = Veratrura 

 album: a plant belonging to Melanthaceae. 

 Red //.=Cephalauthera rubra: a plant be- 

 longing to Orchidaceae. 



Helleborein, (hel-leb'o-rm). [Helleborus, q.v.] 

 C 26 H440 15 : a glucoside found in Helleborus. 



Helleborin, (hel-leb'o-rin). [Helleborus, q.v.] 

 Csfi^gOg: a glucoside found in Helleborus. 



Helleborine, (hel-leb'o-rin). [Helleborus, q.v.] 

 =Epipactis: a plant, with creeping roptstock 

 and leafy stem, belonging to Orchidaceae. 

 Common fi r .=Epipactis latifolia. Marsh H. 

 = Epipactis palustris. White H. =Cephalan- 

 thera grandiflora. Red //.=Cephalanthera 

 rubra. 



Helleborus, ( hel-leb'o-rus ). [Gk. helein, to 

 injure; bora, food.J An herb belonging to 

 Ranuuculaceae. H. nisrer=Christmas rose. 



Helm, (helm). [Helma, the A.-S. word.]= 

 Rudder: the movable piece at the stern of 

 a ship, by the position of which the direction 

 of the vessel is determined. 



Helmias, (hel'mi-as). [Gk. lielmins, worm.] 

 A sub-division of Annuloida, including En- 

 tozoa and Treraatode worms. 



Helminthes, ( hel-min'thez ). [Gk. Helming, 

 worm.]=Acanthocepbali : a sub-division of 

 Vermes, q.v. v. Siebold. 



Helminthia, (hel-min'thi-a). [Gk. helmintttion, 

 little worm.] = Ox-tongue: an herb, with 

 milky juice, belonging to Asteracese: named 

 from the worm-like form of the fruit. 



Helminthiae, (hel-min'thi-e). [Gk. helmins, 

 worms.] = Entozoa: animals belonging to 

 Scolecida, q.v. 



Helminthites, (hel-min'thi-tez). [Gk. helmins, 

 worm.] Worm-tracks found in hardened 

 mud. v. Lithichnozoa. 



Helminthoid, (hel'min-thoid). [Gk. helmins, 

 worm; eidos, form.] Vermiform: having the 

 external characters of worms. 



Helmintholite, ( hel-min'tho-Ht ). [Gk. Hel- 

 mins, worm; lithos, stone.] Fossil remains 

 of worms. 



Helminthologists, (hel-min-thol'o-jists). [Hel- 

 minthology, q.v. ] Students of helminthology. 



Helminthology, (hel-min-thol'o-ji). [Gk. hel- 

 wlins, worm; logos, discourse.] The know- 

 ledge of the nature and habits of worms. 



Helminthozoa, (hel-min-tho-zo'a). [Gk. hel- 



mins, worm; goon, animal. ]r= Scolecida: a 



sub-division of Aunuloida, including ento- 



zoa. 

 Helobiae, (hel-5'bi-6). [Gk. helos, uiarsh.]= 



Water-plantain, &c. : aquatic plants with 



but little, if any, endosperm. 

 Helodus, (hel'o-dus). [Gk. fie los, marsh ; odous, 



tooth.] A fish, known by fossil remains, 



found in Carboniferous rocks. 

 Helonias, (he-lo'ni-as). [Gk. helos, marsh.] 



A plant belonging to Melanthaceae. 

 Helosciadium, (he-16-si-a'di-um). [Gk. helos, 



marsh; skiadeion, shade.] = Marsh- wort : a 



plant belonging to Apiaceae. 

 Helvellaceaj, (hel-vel-la'se-e). [L. Helvetia, 



fungus.]=Ascomycetes=Morels : a division 



of Fungi, q.v. 

 Helvetan, (hel've-tan). A mineral belonging 



to the mica group. 

 Helvetius, Map of the moon by H. : in which 



the seas, &c., are named after the planets, v. 



Moon. 



Helvin, (hel'vin)=Tetrahedral garnet: a va- 

 riety of garnet; a mineral, chiefly silicate of 



iron and manganese. 

 Helwingiacese, (hel-wing-i-a'se-e). [Helwingia, 



the typical genus.]=Helwingiads : shrubs, 



with flowers on mid-rib of leaf, belonging to 



Garryales. 

 Hematein, (he'ma-tin). [Gk. haima, blood.] 



=Hematin: the colouring principle of log- 

 wood. Haematein, q.v. 

 Hematite, (he'ma-tit). [Haimatites, the Greek 



word.] l.=Bloodstone=Haeinatite, q.v. 2. 



=Turgite. Slack #.=Psiiomelane. Brown 



H. =Limonite. 

 Hemato-crystallin= Hsemato-cry stallin= Haa- 



moglobin, q.v. 

 Hemato-globulin=Haemato-globiilin=Ha5mo- 



globin, q.v. 



Hematoidin=H8ematoidin, q.v. 

 Hematology, (he-ma-tol'o-ji). [Gk. haima, 



blood; logos, discourse.]=Haematology: the 



science of the nature and composition of 



blood. 



Hematosin=Haematin, q.v. 

 Hematoxylin=Haematoxylin, q.v. 

 Hemelytra, (hem-i-li'tra). [Gk. hemi, half; 



elytron, sheath.] The wings of some insects 



of Hemiptera which have one half hardened. 

 Hemerobius, (hem-er-o'bi-us)= Aphis-lion: an 



insect, belonging to Neuroptera, the larva 



of which is very voracious. 

 Hemerocallideae, ( hem-er-o-kal'li-de-e ). [Gk. 



hcmera, dav; kallos, beauty. ]=Liliaceae, q.v. 

 Hemi, (hem'i). [The Greek word.] A prefix, 



meaning half. 

 Hemicentetes, (hem-i-sen-t6'tez). [Hemi, q. v,] 



=Tanrec: a hedgehog-like animal, belonging 



to Insectivora, common in Madagascar. 

 Hemicycle, (hem-i-si'kl). (Hemi, q.v.; Gk. 



kyklos, circle.] Half circle; also called semi- 

 circle. 



Hemicyclic flowers, (hem-i-sl'klik). [Hemi- 

 cycle, g.i?.]=Acyclic flowers: having parts of 



the flowers arranged in spirals. 

 Hemidactylus, (hem-i-dak'ti-lus). [Hemi,$.r. ; 



Gk. daktylos, finger.]=Warty Gecko: a lizard. 

 L 



