English dictionary: words starting with prot - page 9

noun

A water-insoluble pectic substance containing glucuronic acid monomers, which is present as a binding substance between plant cell walls, and which breaks down during the ripening of fruits and fleshy roots, giving rise to pectin.

noun

A pectinase that converts protopectin to a soluble form by hydrolysis.

noun

The first-formed elements of the primary phloem, the cells of which mature before the elongation of the surrounding plant tissue.

noun

In a clubmoss: a primitive leaf-like structure produced on the upper surface of the protocorm or tuber.

noun

With singular or plural agreement. a class of primitive plants or plantlike organisms regarded as forming the lowest division of the vegetable kingdom (corresponding to the protozoa in the animal kingdom), specifically one comprising unicellular and other simple green algae. also, with plural agreement (also protophyta): such plants and organisms collectively.

noun

An organism belonging to the class protophyta; especially a unicellular alga.

adjective

Belonging or relating to the class protophyta.

noun

A white crystalline alkaloid present in many plants, especially of the families papaveraceae and fumariaceae.

noun

A large body of matter in orbit around the sun or a star and thought to be developing into a planet.

Usage examples:

This analysis supported the view that the moon originated from a glancing collision between the ear…

noun

The colourless material comprising the living part of a cell, including the cytoplasm, nucleus, and other organelles.

Usage examples:

It was eventually realised that the culprit was a non-cellular form of ‘life’ that could diffuse th…

adjective

Consisting of, or relating to, protoplasm (= the transparent liquid inside all living cells)

Usage examples:

The amoeba is a colourless, single-celled, jelly-like, protoplasmic organism found in sea and fresh…

noun

The protoplasm of a living plant or bacterial cell whose cell wall has been removed.

Usage examples:

In this plasmolysed cell the protoplast has suffered very intense shrinkage.

noun

The basal segments of the biramous limb or appendage of a crustacean.

Usage examples:

Crustacean biramous appendages have a basal or first portion referred to as the protopod.

noun

The basal segments of the biramous limb or appendage of a crustacean.

Usage examples:

Crustacean biramous appendages have a basal or first portion referred to as the protopod.

noun

The basal segments of the biramous limb or appendage of a crustacean.

Usage examples:

Crustacean biramous appendages have a basal or first portion referred to as the protopod.

noun

In the orthodox and eastern catholic churches: a senior priest; an archpriest.

noun

Any of a group of fifteen isomeric porphyrins having the formula c₃₄ h₃₄ n₄ o₄, in which the porphin nucleus has four methyl, two vinyl, and two propionic acid substituents; especially (more fully "protoporphyrin ix") the isomer which occurs widely in living organisms, mainly as haem (in which it is bonded to an iron atom).

noun

A polypeptide produced by partial proteolysis.

noun

A genus of dipnoan fishes comprising four african lungfishes, which have long, fringed, filamentous pectoral and pelvic fins and are usually placed in their own family, protopteridae; (also † protopterus) a fish of this genus.

noun

The primitive pyramid of a crystal system, in which the horizontal axes of the system intersect the edges of the pyramid (as opposed to one in which the axes intersect the faces midway between the edges).

noun

An early fossil reptile of the genus protorosaurus or the order protorosauria (now often called araeoscelidia).

adjective

Of, relating to, or designating fossil reptiles of the genus protorosaurus and their allies; specifically belonging to the order protorosauria.

noun

A genus of diapsid reptiles known from european fossils of the late permian period, which are among the earliest known reptiles; (also protorosaurus) a reptile of this genus.

noun

A salt in which the anion occurs in the smallest possible proportion relative to the metal cation (i.e. in which the metal occurs in its lowest oxidation state).

adjective

Of or relating to primitive science, or an early stage in the development of modern science.