#cell structure
- Achromic — Lacking color, discolored, or completely devoid of natural pigments; describing a cellular structure, plant tissue, or microscopic organism presenting a native transparency or chromatic neutrality.
- Alesida — A specialized term, occasionally used in biology or descriptive botany, referring to a protective cellular structure or a specific membranous envelope. In a broad or experimental sense, it can describe an organic entity from a restricted class of microbial structural compounds.
- Alloplasm — The differentiated part of a cell's cytoplasm that has become structurally modified to perform specific mechanical or physiological functions (such as myofibrils in muscle cells, neurofibrils in neurons, or vibratile cilia), as opposed to the fundamental protoplasm (trophoplasm) responsible for basic metabolism.
- Alveolus — A small cavity or natural hollow located within an animal or plant organ or tissue. In pulmonary anatomy, it represents the microscopic terminal sac of the airways where gas exchange occurs; in dentistry, it denotes the socket in the jawbones where the tooth root is anchored. By extension, in technology, it defines each of the cells in a package or an alveolar material.
- Alveolar — Pertaining to alveoli, relating to alveoli, having the shape of alveoli, or provided with alveoli; formed by a network of small structural cavities. In linguistics, it describes sounds (consonants) articulated by touching the alveoli of the upper teeth with the tip of the tongue (such as 'd', 't', 'n', 's', 'z').
- Amoeba — A neologic and academic graphical variant for 'amibă'; a microscopic unicellular organism from the protozoan phylum, lacking a rigid cell membrane, characterized by its constantly changing body shape. It moves and captures food (bacteria or other microorganisms) by means of temporary protoplasmic extensions called pseudopods.
- Simple — Being simple, uncompounded, single, or formed of a single structural element or a uniform chromatic shade. The term represents a rare adjectival adaptation of the Greek root 'haplos', sometimes used in old academic botanical works to describe a flower with a single row of petals or a plant organ unseparated into lobes.
- Ascogenous — Producing or giving rise to asci; a structural term used in mycology to describe the special hyphae (ascogenous hyphae) that arise from the female cell (ascogonium) after the plasmogamy process. These dikaryotic cellular structures develop inside the fruiting body and are directly responsible for forming the final sporiferous apparatus of ascomycete fungi.
- Ascospore — A microscopic spore with a sexual reproductive function, formed inside a special sac-like cell called an ascus, characteristic of fungi in the Ascomycota phylum. This structural element results from a sequential process of cell division (meiosis followed by mitosis), being released into the environment at maturity to germinate and form a new mycelium.
- Azygoid — Pertaining to a haploid organism, cell, or biological structure developed through parthenogenesis, lacking a homologous pair; a biological entity that possesses a single set of chromosomes and develops directly from an unfertilized egg, bypassing the zygote stage.