n. 蜘蛛, 设圈套者

[化] 星形轮

[医] 蜘蛛; 蜘蛛痣

Spider \Spi"der\, n.[OE. spi[thorn]re, fr. AS. spinnan to spin;
-- so named from spinning its web; cf. D. spin a spider, G.
spinne, Sw. spindel. See {Spin}.]
1. (Zo["o]l.) Any one of numerous species of arachnids
comprising the order Araneina. Spiders have the mandibles
converted into poison fangs, or falcers. The abdomen is
large and not segmented, with two or three pairs of
spinnerets near the end, by means of which they spin
threads of silk to form cocoons, or nests, to protect
their eggs and young. Many species spin also complex webs
to entrap the insects upon which they prey. The eyes are
usually eight in number (rarely six), and are situated on
the back of the cephalothorax. See Illust. under
{Araneina}.

Note: Spiders are divided into two principal groups: the
Dipneumona, having two lungs: and the Tetrapneumona,
having four lungs. See {Mygale}. The former group
includes several tribes; as, the jumping spiders (see
{Saltigrad[ae]}), the wolf spiders, or {Citigrad[ae]}
(see under {Wolf}), the crab spiders, or
{Laterigrad[ae]} (see under {Crab}), the garden, or
geometric, spiders, or {Orbitell[ae]} (see under
{Geometrical}, and {Garden}), and others. See {Bird
spider}, under {Bird}, {Grass spider}, under {Grass},
{House spider}, under {House}, {Silk spider}, under
{Silk}.

2. (Zo["o]l.) Any one of various other arachnids resembling
the true spiders, especially certain mites, as the red
spider (see under {Red}).

3. An iron pan with a long handle, used as a kitchen utensil
in frying food. Originally, it had long legs, and was used
over coals on the hearth.

4. A trevet to support pans or pots over a fire.

5. (Mach.) A skeleton, or frame, having radiating arms or
members, often connected by crosspieces; as, a casting
forming the hub and spokes to which the rim of a fly wheel
or large gear is bolted; the body of a piston head; a
frame for strengthening a core or mold for a casting, etc.

{Spider ant}. (Zo["o]l.) Same as {Solitary ant}, under
{Solitary}.

{Spider crab} (Zo["o]l.), any one of numerous species of
maioid crabs having a more or less triangular body and ten
long legs. Some of the species grow to great size, as the
great Japanese spider crab ({Macrocheira Kempferi}),
measuring sometimes more than fifteen feet across the legs
when they are extended.

{Spider fly} (Zo["o]l.), any one of numerous species of
parasitic dipterous insects of the family
{Hippoboscid[ae]}. They are mostly destitute of wings, and
live among the feathers of birds and the hair of bats.
Called also {bird tick}, and {bat tick}.

{Spider hunter} (Zo["o]l.), any one of several species of
East Indian sunbirds of the genus {Arachnothera}.

{Spider lines}, filaments of a spider's web crossing the
field of vision in optical instruments; -- used for
determining the exact position of objects and making
delicate measurements. Fine wires, silk fibers, or lines
on glass similarly placed, are called spider lines.

{Spider mite}. (Zo["o]l.)
(a) Any one of several species of parasitic mites of the
genus {Argas} and allied genera. See {Argas}.
(b) Any one of numerous small mites injurious to plants.


{Spider monkey} (Zo["o]l.), any one of numerous species of
South American monkeys of the genus {Ateles}, having very
long legs and a long prehensile tail.

{Spider orchis} (Bot.), a European orchidaceous plant
({Ophrys aranifera}), having flowers which resemble
spiders.

{Spider shell} (Zo["o]l.), any shell of the genus
{Pteroceras}. See {Pteroceras}.