a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States

a submersible warship usually armed with torpedoes

be a substitute

before a judge or court of law; awaiting judicial determination

in secret or covertly

a unit assembled separately but designed to fit with other units in a manufactured product

an interval that is included in another interval

designed and carried out secretly or confidentially

of or relating to or situated in the region south of the Sahara Desert

the region of Africa to the south of the Sahara Desert

one of a battery of related tests

slightly sour to the taste

less than acute; relating to a disease present in a person with no symptoms of it

a chronic bacterial infection of the endocardium and heart valves; symptoms develop slowly

a rare chronic progressive encephalitis caused by the measles virus and occurring primarily in children and young adults; death usually occurs within three years; characterized by primary measles infection before the age of two years

a rare chronic progressive encephalitis caused by the measles virus and occurring primarily in children and young adults; death usually occurs within three years; characterized by primary measles infection before the age of two years

a rare chronic progressive encephalitis caused by the measles virus and occurring primarily in children and young adults; death usually occurs within three years; characterized by primary measles infection before the age of two years

growing at high altitudes

medium-tall timber tree of the Rocky Mountains having a narrowly conic to columnar crown

medium-sized larch of the Rocky Mountains; closely related to Larix occidentalis

a British commissioned army officer below the rank of captain

inferior in rank or status

growing or remaining under water

partially aquatic; living or growing partly on land and partly in water

growing or remaining under water

a space in the meninges beneath the arachnoid membrane and above the pia mater that contains the cerebrospinal fluid

of or relating to latitudes just south of the Arctic Circle

(of water) rising naturally in a well to a height appreciably above that of the surrounding water table but not flowing out of the well

of or relating to constituents of the atom or forces within the atom

of smaller than atomic dimensions

a body having finite mass and internal structure but negligible dimensions

the lowest molding of an architectural base or of a baseboard

working as a substitute for someone who is ill or on leave of absence

(biology) a taxonomic category below a class and above an order

a subclass of Sporozoa

heliozoans; radiolarians

one of four subclasses or superorders of Monocotyledones; comprises about 500 species in 14 families of aquatic and semiaquatic herbs

a class of Gastropoda

oldest known reptiles; turtles and extinct Permian forms

primitive reptile-like fossil birds of the Jurassic or early Cretaceous

a large subclass of diapsid reptiles including: crocodiles; alligators; dinosaurs; pterosaurs; plesiosaurs; ichthyosaurs; thecodonts

one of four subclasses or superorder of Monocotyledones; comprises about 6400 species in 5 families of trees and shrubs and terrestrial herbs and a few free-floating aquatics including: Palmae; Araceae; Pandanaceae and Lemnaceae

a group of mostly sympetalous herbs and some trees and shrubs mostly with 2 fused carpels; contains 43 families including Campanulales; Solanaceae; Scrophulariaceae; Labiatae; Verbenaceae; Rubiaceae; Compositae; sometimes classified as a superorder

primitive aquatic mainly freshwater crustaceans: fairy shrimps; brine shrimps; tadpole shrimps; can shrimps; water fleas

a group of families of mostly flowers having basal or central placentation and trinucleate pollen (binucleate pollen is commoner in flowering plants); contains 14 families including: Caryophyllaceae (carnations and pinks); Aizoaceae; Amaranthaceae; Batidaceae; Chenopodiaceae; Cactaceae (order Opuntiales); Nyctaginaceae; Phytolaccaceae; corresponds approximately to order Caryophyllales; sometimes classified as a superorder

barnacles

single-host parasites of lower vertebrates and invertebrates

one of four subclasses or superorders of Monocotyledones; comprises about 19,000 species in 25 families of mostly terrestrial herbs especially of moist places including: Cyperaceae; Gramineae; Bromeliaceae; and Zingiberaceae

minute planktonic or parasitic crustaceans

fishes having paired fins resembling limbs and regarded as ancestral to amphibians