adj. [Gr. limne, marsh, lake, pool]
1. Living in standing fresh water.
2. Inhabiting the pelagic zone in a body of fresh water; limnicolous.
n. [Gr. limne, marsh, lake, pool]
A lake community.
n. [Gr. limne, marsh, lake, pool; bios, life]
All life in fresh water.
n. [Gr. limne, pond; logos, discourse]
The study of fresh waters, in physical, chemical, meteorological and biological conditions.
adj. [L. limpidus, clear]
Characterized by being clear or transparent.
n.; pl. lineae [L. linea, line]
Linear markings or structures.
adj. [L. linea, line]
Marked longitudinally with depressed parallel lines or striae.
n. [L. dim. linea, line]
Marked with minute lines.
n. [L. lingua, tongue]
The tongue; maxillary appendages; the hypopharynx, or organ of; glossa.
adj. [L. lingua, tongue]
Of or pertaining to the tongue.
[L. lingua, tongue]
The radula or odontophore.
In Psocidae, two oval sclerites, each connected to a median sitophore sclerite by a fine filament.
adj. [L. lingua, tongue; forma, shape]
n. [L. dim. lingua, tongue]
In Aleyrodidae, a tongue or strap-shaped organ in the vasiform orifice with the anal opening at the base where honeydew ...
Free swimming bivalve larvae of the order Lingula with elongate valves; see discinid.
n. [ME. linke]
The association in heredity of genes located in the same chromosome; the more tightly they are linked, the less likely they will be separated by crossing ...
A group of gene loci placed in a linear order on a chromosome.
A small piece of synthetic DNA with a restriction site used to splice genes together.
n. [Linne, Swedish naturalist]
A taxon distinguished on morphological grounds, generally applies to one of the large species described by early naturalists.
n. [A.S. lippa, lip]
Any liplike part or structure.
A disc-like, anterior-most cuticular annulation, circumoral and usually thicker than adjacent head annuli.
A glandular organ with a ciliated groove running from pore to tip of lip.
A ring at or near the oral aperture formed by fused, separate or subdivided cheilorhabdions.
n. [Gr. lipos, fat; -ase, enzyme]
An enzyme that hydrolyses fats.
n. pl. [Gr. lipos, fat]
Organic compounds soluble in various organic liquids and insoluable in water; including carbon and hydrogen with a small proportion of oxygen and/or ...
n. [Gr. lipos, fat]
Complex lipids such as phospholipids, glycolipids, and cerebrocides.
[A.S. dim. lippa, lip]
Small, reduced lips restricted to the apex of the head; pseudolips.
n. [Gr. lipos, fat; chroma, color]
Fat soluble pigments.
n. [Gr. leipo, to be lacking; gaster, stomach]
Temporary obliteration of gastral cavity as occurs in sponges and some other organisms.
adj. [Gr. lipos, fat; eidos, like]
Of fatty nature.
n. [Gr. lipos, fat; lysis, loosen]
Decomposition of fat by lipase; lipolytic adj..
n. [Gr. leipo, to be lacking; meros, part; ismos, denoting condition]
Coalescence or suppression of segmentation.
n. [Gr. lipos, fat; mikros, little]
Minute fat particles found in the blood.
n. [Gr. leipo, to be lacking; palin, anew; genesis, beginning]
The omission of a stage or series of stages in phylogeny.
n. [Gr. lipos, fat; polys, many; sakcharon, sugar]
Molecule with a lipid attached to a polysaccharide.
n. [Gr. lipos, fat; proteios, primary]
Molecule with a lipid joined to a protein.
adj. [Gr. leipo, to be lacking; stoma, mouth]
Having no apertures visible to the naked eye.
n. [Gr. lipos, fat; trephein, to eat]
A compound with an affinity for lipids; influencing fat metabolism.
n., pl. lirae [L. lira, ridge]
1. Fine grooves or thread-like sculpture or ridge.
2. (MOLLUSCA: Gastropoda)
Fine linear elevation on a shell surface or within outer lip; ...
n. [A.S. liste, ridge]
In Ostracoda, a ridge inside the selvage on the sealing margin of the shell.
n. [Gr. listrion, small shovel]
(BRACHIOPODA:Inarticulata) In some Discinidae, a plate closing the anterior end of the pedicle opening.
n. [Gr. lithos, stone]
A reticulated skeleton.
n. [Gr. lithos, stone; kytos, container]
Cell within a statocyst that contains the movable concretion or statolith; lithocyst.
n. [Gr. lithos, stone; desma, bond]
1. A calcareous reinforcement of the internal ligament.
2. A small shelly plate; ossiculum.
adj. [Gr. lithos, stone; domos, house]
Living in or burrowing in rock.
adj. [Gr. lithos, stone; phagein, to eat]
Burrowing in rock.
n. [Gr. lithos, stone; serere, to join]
A sere originating on exposed rock surfaces; see xerosere, hydrosere.
adj. [Gr. lithos, stone; tomos, cut]
adj. [L. litoralis, of the seashore]
Of or pertaining to a shore, coastline, or region between high and low water marks.
adj. [L. lituus, augur\'s staff]
Being forked with prongs outwardly curving.
An obscure color spot with pale margins; appearing daubed or blotted.
Digestive gland in crustaceans and other invertebrates; see hepatopancreas.
adj. [L. lividus, to be black and blue]
Pale purplish-brown; lead-colored; ashy-pale.
Outer part of the zooid body cavity that contains the major organs.
adj. [Gr. lobos, lobe]
Of or pertaining to a lobe or lobes.
adj. [Gr. lobos, lobe]
Provided with lobes; lobed.
n. [Gr. lobos, lobe]
A generally rounded part or projection of a part or organ.
adj. [Gr. lobos, lobe; L. forma, shape]
Shaped like a lobe or rounded process.
n. pl. [Gr. lobos, lobe; pous, foot]
Annulate, sacklike legs with internal musculature.
n. [Gr. dim. lobos, lobe]
The proximal synaptic area in the optic lobes; see lobular complex.
Lobula and lobular plate of the interior synaptic region of the optic lobes; see medulla interna, opticon.
adj. [Gr. dim. lobos, lobe]
Divided into small lobes or lobules.
In Campodea, glands situated in the head and the anterior part of the prothorax composed of cells arranged around a system of ducts opening into the ...
n. [F. dim. lobos, lobe]
A small lobe.
n.; pl. -li [F. dim. lobos, lobe]
A lobe or lobule; see alula.
The individuals of a potentially interbreeding community; see deme, population.
n. [L. locus, place]
Local variations in the abundance or proportion of dominant species in an association.
lock and key theory
Morphological theory of antibody-antigen, enzyme-substrate, and insect genitalia interactions; fitting exactly for the interactions to take place.
adj. [L. loculus, cell]
Having or containing small cavities or chambers.
n.; pl. loculi [L. loculus, cell]
1. A cavity, compartment or chamber.
Cavities between septa at the base of some polyps.
3. (PLATYHELMINTHES: Turbellaria)
n.; pl. -ci [L. locus, place]
The position of a gene in a chromosome; may be occupied by any gene of a particular allelic series.
n. [L. lodix, blanket]
The ventral plate of the seventh (7th) abdominal segment that covers the genital plate in Lepidoptera.
Geometric or exponential growth section of the logistic curve characteristic of unrestrained population growth.
Growth of a population with time as described by a sigmoid curve; begins slowly, increases rapidly, and grows slowly or not at all as the population fills available sites.
n. [Gr. logos, word; typos, type]
A type species of a genus by subsequent designation, not originally described as such.
adj. [L. longus, long; cornu, horn]
Having long antennae as in certain beetles.
adj. [L. longus, long; penna, wing]
adj. [L. longus, long; rostrum, beak]
Having a long beak or rostrum.
adj. [L. longus, long]
1. Lengthwise of the body or an appendage.
2. The length of a shell or direction of the longest diameter.
Layer of longitudinal muscle of the body wall sometimes thickened into bundles.
The somatic muscles of nematodes.
The cuticular fold projecting anteriorly from the stoma of diplogasterids supporting the circumoral membrane.
An inner and outer laminae partition of the compartmental plate in some balanomorph barnacles, resulting in longitudinal tubes; parietal tubes.
In some Balanamorpha, a canal between longitudinal septa and inner and outer lamina in the compartmental plate; longitudinal canal; parietal ...
n. [ME. loupe, loop]
A support for the lophophore composed of secondary shell and variously placed, usually ribbon-like with or without supporting septum from ...
n. [Eng. looper, to crawl or slink]
1. Caterpillars with two or more anterior prolegs reduced or missing.
2. Crawl in a looping manner like the ...
adj. [Gr. lophos, crest; branchia, gills]
Having tufted gills.
n. [Gr. lophos, crest; A.S. coltraeppe, type of thistle]
A sponge spicule with branched or crested rays.
n. [Gr. lophos, crest; kytos, container]
Mobile collagen-secreting cells that trail attached collagen fibrils.
Part of the vesicle of the polypide from which the lophophore is formed.
n. [Gr. lophos, crest; pherein, to carry]
A crown of tentacles, found in Bryozoa, Brachiopoda and Phoronida.
A long movable cylindrical structure formed by the everted tentacle sheath that allows extension of the tentacles beyond the orifice.
A laterally extending process from the middle of each suspensorium of the hypopharynx of certain primitive pterygote insects.
n.; pl. -ae [L. lorica, corselet]
A hard shell or case on Rotifera, Loricifera and Priapulida larvae; see cuirass.
adj. [L. lorica, corselet]
To cover with a protective coating or crust.
n. [L. lorica, corselet; fero, bear]
A phylum of microscopic organisms with a flexible, retractable tube mouth, a girdle of platelets and a crown of clawlike and ...
n.; pl. lora [L. lorum, strap]
1. (ARTHROPODA: Chelicerata)
In Arachnida, a protective dorsal plate on the pedicle.
2. (ARTHROPODA: Insecta)
a. The cheek. b. A sclerite ...
adj. [L. lotus, washed]
Living in rapidly flowing waters; applied to organisms that inhabit these waters; see lentic.
adj. [ON. lagr, low]
The abapical part of the shell.
lower latus plate
In Cirripedia, a valve near the basis of the shell.
n. [Gr. loxos, oblique; meta, behind; nema, thread]
Metaneme that is at an angle of 10-30 o to the longitudinal body line; found running diagonally across the ...
n. [OF. losenge, a square window pane]
A parallelogram with four equal sides having two acute and two obtuse angles; lozenge-shaped; a rhombus form; diamondshaped.
adj. [L. lucidus, clear]
Luminous; translucent; pellucid; shining.
n. [L. lux, light; ferre, to bring; -ase, enzyme]
An enzyme of luminescent organisms involved in the oxidation of luciferin and the production of light.
n. [L. lux, light; ferre, to bring]
A substance found in luminescent organisms that, in the presence of the enzyme luciferase, oxidizes and produces light.
adj. [L. lux, light; fugere, to flee]
Avoiding the light, or living in concealment; see photophobic, lucipetal.
Having 2 cardinal teeth in each valve; left valve anterior tooth is medial below the beak.
adj. [L. lux, light; petere, to seek]
Requiring light; see lucifugous.
Large paired ganglia in the anal region which receive the lateral nerves and from which the laterocaudal nerves pass posteriad in the tail.
adj. [L. lumbricus, earthworm; forma, shape]
Like an earthworm in appearance; lumbricoid; see vermiform.
adj. [L. lumbricus, earthworm]
Having 4 pairs of setae per segment as in earthworms of the family Lumbricidae; see perichaetine.
n. [L. lumen, light]
Space within any tubular organ or vessel.
adj. [L. lumen, light]
Having a lumen.
adj. [L. lumen, light; escens, beginning of]
Producing light; see bioluminescence.
1. Specialized light emitting organs of various invertebrates; see bioluminescence.
2. (MOLLUSCA: Cephalopoda)
Open ectodermal pockets filled with luminescent bacteria.
adj. [L. luna, moon]
Semicircular; falcate; crescentshaped.
n.; pl. lunulae [L. dim. luna, moon]
1. A small lunate mark or crescent-shaped object.
2. (MOLLUSCA: Gastropoda)
A crescentic ridge on the selenizone, concave toward ...
n. [L. dim. luna, moon]
1. A crescent-shaped part or marking.
2. (ARTHROPODA: Crustacea)
In Copepoda, small, sucker-like adhesion disc on the anterior margin.
adj. [L. luridus, pale yellow]
A dirty yellowish color; dismal; dingy.
adj. [L. luteus, golden yellow]
Yellow in hue, especially an orange or reddish yellow.
n. [Gr. lykos, hook; pherein, to carry]
Ten-hooked first larval stage of a tapeworm; a decacanth.
n. [Gr. lygaios, gloomy; philos, fond of]
Shade or darkness dwellers.
1. (ANNELIDA: Oligochaeta)
Organs on the anterior faces of septa associated with the dorsal blood vessel, in the intestinal regions of some earthworms, possibly functioning ...
n. [Gr. lyein, to loose; kytos, hollow]
The process of histolysis by extracellular digestion.
In Lepidoptera, paired accessory glands opening by a separate duct into the silk gland on its own side; Filippi\'s glands.
n. [L. lyra, lyre]
Stridulating organs of arachnids found on various places of the male body; they consist of a tooth (or teeth) that rubs against ...
adj. [L. lyra, lyre]
Lyre-shaped; spatulate and oblong with small lobes toward the base.
n. [L. lyra, lyre]
In caterpillars, the border or upper wall of the spinning tube.
Like a string musical instrument with two curved arms and strings attached to a yolk between the curved arms.
n. [L. lyra, lyre; fissura, crack]
Small fissures or pores in the cuticle of the body or appendages; sometimes with an internal channel; thought ...
In arachnids, a lyreshaped organ on the joints of the legs and other appendages, sterna of the cephalothorax and abdomen and on the sting of ...
n. [L. dim. lyra, lyre]
A median tooth on the proximal edge of the orifice.
adj. [Gr. lysis, loosen]
To undergo lysis.
n. [Gr. lysis, loosen; gene, to produce; -oma, tumor]
The name given a group of giant cells or syncytia denoting their origin from lysis or dissolution of walls of ...
n. [Gr. lysis, loosen]
Any of a number of substances capable of dissolving cells, bacteria, or tissues.
n. [Gr. lysis, loosen]
1. The decomposition of a substance.
2. The digestion of cells or tissues by enzymatic action.
adj. [Gr. lysis, loosen; akis, point]
Skeletal framework formed by interlacing of the elongate rays of hexactines producing loose networks with ...
adj. [Gr. lysis, loosen]
Pertaining to lysis or to a lysin.
v. [L. macerare, to soften]
To waste away; to soften or wear away.
n. [Gr. makros, large; aner, male]
A male ant of unusually large form.
n. [Gr. makros, large; ergate, worker]
In Formicidae, an unusually large worker.
n. [Gr. makros, large; bios, life]
Larger organisms in the soil, such as insects and earthworms; see mesobiota.
In Hymenoptera, a large female of Halictidae, that possesses a disproportionately large head, usually the egg layers of the colony.
Cystophorous type cercaria with a long, simple, cylindrical tail.
n. pl. [Gr. makros, large; chaite, hair]
Large bristles; see chaetotaxy.
n. pl.; sing. -ium [Gr. makros, large; L. cilium, eyelash]
In Beroida, 2,500-3,500 giant ciliary shafts interconnected and bound together on the mobile lips that ...
n. pl. [Gr. makros, large; kneme, lower leg]
In Actinaria, complete and filamented mesenteries in the first one or two cycles of simple tentacles; ...
n. [Gr. makros, large; L. evolvere, to unroll]
Evolutionary processes that extend through geologic eras; large scale evolution of new species and genera due to mutations that ...
n. [Gr. makros, large; L. Faunus, diety of herds and fields]
1. Widely distributed; from a macrohabitat.
2. Animals measured in centimeters rather than microscopic units.
n. [Gr. makros, large; gamete, wife]
A large, quiescent, female anisogamete; see microgamete.
n. [Gr. makros, large; gamein, to marry; kytos, container]
The infected human red blood cell that contains the female form of the malarial parasite which upon transfer to the ...
n. [Gr. makros, large; genesis, origin]
The sudden origin of new species by saltation.
n. [Gr. makros, large; gyne, woman]
In Formicidae, a female or queen of unusually large stature.
adj. [Gr. makros, large; lekethos, egg yolk]
With a large amount of yolk; see microlecithal.
n. [Gr. makros, large; meros, part]
A distinctly large cell resulting from unequal cleavages during early embryology.
n. [Gr. makros, large; mesos, middle; enteron, gut]
One of the larger complete mesenteries.
n. [Gr. makros, large; mitos, thread; soma, body]
The paranucleus as seen in Lepidoptera.
n. [Gr. makros, large; L. moles, mass]
Very large molecules such as protein, cellulose, starch, etc.
n. [Gr. makros, large; mutare, to change]
Theory of instantaneous evolution of new taxa by a mutation that establishes reproductive isolation at once.
adj. [Gr. makros, large; notos, back]
Having a large thorax, as a queen ant.
n. [Gr. makros, large; phagein, to eat]
A large phagocytic cell of the body.
adj. [Gr. makros, large; phagein, to eat]
Feeding on large objects; see microphagous.
adj. [Gr. makros, large; ophthalmos, eye]
Having large eyes; having eyes larger than normal.
n. [Gr. makros, large; planktos, wandering]
Large organisms such as jellyfish that drift with the currents.
adj. [Gr. makros, large; pteron, wing]
Having a long or large wing; see brachypterous.
adj. [Gr. makros, large; skopein, to view]
Capable of being studied with the unaided eye; megascopic; see microscopic.