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Ostium

/ˈästēəm/ Noun, pl. ostia 1. A small opening or orifice, as in a body organ or passage. (wiktionary.org) 2. a. Any of the small openings or pores in a sponge. (wiktionary.org) b. Each of a number of pores in the wall of a sponge, through which water is drawn in. (Google Dictionary) 3. A mouthlike opening in a bodily part (as a fallopian tube or a blood vessel)....

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Otic

/ˈōtik/  /ˈätik/ Adjective 1. Of, relating/pertaining to, or located near the ear. (wiktionary.org) Syn: auricular Word origin: From Greek otikos, from ous (genitive otos)...

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Otolith

/ˈōtlˌiTH/ Noun, pl. otoliths 1. A structure in the saccule or utricle of the inner ear, specifically in the vestibular labyrinth of vertebrates. The saccule and utricle, in turn, together make the otolith organs. They are sensitive to gravity and linear acceleration. Because of their orientation in the head, the utricle is sensitive to a change in horizontal movement, and the saccule gives information about vertical acceleration (such as when in an elevator). (wikipedia.org) 2. A small particle, comprised mainly of calcium carbonate, found in the inner ear of vertebrates, being part of the balance sense. (wiktionary.org) 3. A calcareous concretion in the inner ear of a vertebrate or in the otocyst of an invertebrate that is especially conspicuous in many bony fishes where it forms a hard body and in most of the higher vertebrates where it is represented by a mass of small calcareous otoconia. (merriam-webster.com) 4. Each of three small oval calcareous bodies in the inner ear of vertebrates, involved in sensing gravity and movement. (Google Dictionary) Syn: statoconium,...

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Ovary

/ˈōv(ə)rē/ Noun, pl. ovaries The organ in female mammals and types of plant that is responsible for the production of female gametes and also responsible for the secretion of some sex hormones like estrogen. (biology-online.org) (Anatomy) 1. A female reproductive organ, often paired, that produces ova and in mammals secretes the hormones estrogen and progesterone. (wiktionary.org) 2. One of two small oval bodies situated on either side of the uterus on the posterior surface of the broad ligament. One of usually two organs that produce ova and secrete estrogen and progesterone. (biology-online.org) 3. The structures in which the ova (eggs) are developed and released during ovulation. (biology-online.org) (Botany) 1. The lower part of a pistil or carpel that bears ovules and ripens into fruit. (wiktionary.org) 2. The organ that bears the ovules of a flower. (biology-online.org) 3. The enlarged rounded usually basal portion of the pistil or gynoecium of an angiospermous plant that bears the ovules and consists of one or more carpels. (merriam-webster.com) Word origin: From Modern Latin ovarium “ovary”, from Medieval Latin ovaria “the ovary of a bird”, from Latin ovum...

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Oviparous

/ōˈvipərəs/ Adjective 1. Egg-laying; depositing eggs that develop and hatch outside the body as a reproductive strategy. (wiktionary.org) 2. Producing eggs that develop and hatch outside the maternal body; also : involving the production of such eggs. (merriam-webster.com) 3. Animals that lay eggs, with little or no other embryonic development within the mother. This is the reproductive method of most fish, amphibians, reptiles, all birds, the monotremes, and most insects, some molluscs and arachnids. (wikipedia.org) Word origin: From Latin oviparus, from ovum “egg” + stem of parere “to bring...

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