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es of cells, or even of separate cells, and never show a distinction into root, stem, and leaf.

Having three lobes. Three-lobed leaf (Bot.), a leaf divided into three parts, the sinuses extending not more than half way to the middle, and either the parts of the sinuses being rounded.

Having three nerves. Three-nerved leaf (Bot.), a leaf having three distinct and prominent ribs, or nerves, extending from the base.

Divided into, or consisting of, three parts; tripartite. Three- parted leaf (Bot.), a leaf divided into three parts down to the base, but not entirely separate.

Having three sides, especially three plane sides; as, a three- sided stem, leaf, petiole, peduncle, scape, or pericarp.

by the grating of the crystal granules on each other. -- Tin foil, tin reduced to a thin leaf. -- Tin frame (Mining), a kind of buddle used in washing tin ore. -- Tin liquor, Tin mordant (Dyeing), stannous chloride, used as a mordant in dyeing and calico printing. -- Tin penny, a customary duty in England, formerly…

A thin, boarded brush made of camel's hair, used by gilders in lifting gold leaf.

Covered with matted woolly hairs; as, a tomentose leaf; a tomentose leaf; a tomentose membrane.

, linear or oblong, and fleshy, blunt at the end, and convex beneath; as, a tongue-shaped leaf.

An angular or prominence on any edge; as, a tooth on the scale of a fish, or on a leaf of a plant; specifically (Bot.),

Having a toothlet or toothlets; as, a toothleted leaf. [Written also toothletted.]

he larvæ of which usually roll up the leaves of plants on which they live; -- also called leaf roller.

irections; wreathed; twisted; winding; as, a tortuous train; a tortuous train; a tortuous leaf or corolla. The badger made his dark and tortuous hole on the side of every hill where the copsewood grew thick. Macaulay.

A charge representing the clover leaf.

uivering; as, a tremulous limb; a tremulous motion of the hand or the lips; the tremulous leaf of the poplar.

Oblong or elongated, and having three lateral angles; as, a triangular seed, leaf, or stem. Triangular compasses, compasses with three legs for taking off the angular points of a triangle, or any three points at the same time. -- Triangular crab (Zoöl.), any maioid crab; -- so called because the carapace is usually tr…

A hair on the surface of leaf or stem, or any modification of a hair, as a minute scale, or star, or gland. The sporangia of ferns are believed to be of the nature of trichomes. -- Tri*chom"a*tous, a.

Three-pointed; ending in three points; as, a tricuspidate leaf.

Having three leaves or leaflets, as clover. See Illust. of Shamrock.

(Bot.) Having three leaflets.